一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

无

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

| debian | | https://security-tracker.debian.org/tracker/CVE-2024-26992 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

无

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

| ubuntu | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee (6.9-rc5) | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://launchpad.net/bugs/cve/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://security-tracker.debian.org/tracker/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| debian | | https://security-tracker.debian.org/tracker/CVE-2024-26992 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

| ubuntu | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee (6.9-rc5) | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://launchpad.net/bugs/cve/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://security-tracker.debian.org/tracker/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| debian | | https://security-tracker.debian.org/tracker/CVE-2024-26992 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

| debian | | https://security-tracker.debian.org/tracker/CVE-2024-26992 |

| ubuntu | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee (6.9-rc5) | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://launchpad.net/bugs/cve/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://security-tracker.debian.org/tracker/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

| ubuntu | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee (6.9-rc5) | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://launchpad.net/bugs/cve/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| ubuntu | https://security-tracker.debian.org/tracker/CVE-2024-26992 | https://ubuntu.com/security/CVE-2024-26992 |

| debian | | https://security-tracker.debian.org/tracker/CVE-2024-26992 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2024-26992](https://nvd.nist.gov/vuln/detail/CVE-2024-26992)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:KVM: x86/pmu: Disable support for adaptive PEBSDrop support for virtualizing adaptive PEBS, as KVM s implementation isarchitecturally broken without an obvious/easy path forward, and becauseexposing adaptive PEBS can leak host LBRs to the guest, i.e. can leakhost kernel addresses to the guest.Bug #1 is that KVM doesn t account for the upper 32 bits ofIA32_FIXED_CTR_CTRL when (re)programming fixed counters, e.gfixed_ctrl_field() drops the upper bits, reprogram_fixed_counters()stores local variables as u8s and truncates the upper bits too, etc.Bug #2 is that, because KVM _always_ sets precise_ip to a non-zero valuefor PEBS events, perf will _always_ generate an adaptive record, even ifthe guest requested a basic record. Note, KVM will also enable adaptivePEBS in individual *counter*, even if adaptive PEBS isn t exposed to theguest, but this is benign as MSR_PEBS_DATA_CFG is guaranteed to be zero,i.e. the guest will only ever see Basic records.Bug #3 is in perf. intel_pmu_disable_fixed() doesn t clear the upperbits either, i.e. leaves ICL_FIXED_0_ADAPTIVE set, andintel_pmu_enable_fixed() effectively doesn t clear ICL_FIXED_0_ADAPTIVEeither. I.e. perf _always_ enables ADAPTIVE counters, regardless of whatKVM requests.Bug #4 is that adaptive PEBS *might* effectively bypass event filters setby the host, as Updated Memory Access Info Group records informationthat might be disallowed by userspace via KVM_SET_PMU_EVENT_FILTER.Bug #5 is that KVM doesn t ensure LBR MSRs hold guest values (or at leastzeros) when entering a vCPU with adaptive PEBS, which allows the guestto read host LBRs, i.e. host RIPs/addresses, by enabling LBR Entries records.Disable adaptive PEBS support as an immediate fix due to the severity ofthe LBR leak in particular, and because fixing all of the bugs will benon-trivial, e.g. not suitable for backporting to stable kernels.Note! This will break live migration, but trying to make KVM play nicewith live migration would be quite complicated, wouldn t be guaranteed towork (i.e. KVM might still kill/confuse the guest), and it s not clearthat there are any publicly available VMMs that support adaptive PEBS,let alone live migrate VMs that support adaptive PEBS, e.g. QEMU doesn tsupport PEBS in any capacity.

漏洞公开时间：2024-05-01 14:15:16

漏洞创建时间：2024-05-01 15:09:51

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2024-26992

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/ | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/ | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-26992 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/037e48ceccf163899374b601afb6ae8d0bf1d2ac | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/0fb74c00d140a66128afc0003785dcc57e69d312 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/7a7650b3ac23e5fc8c990f00e94f787dc84e3175 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/stable/c/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26992.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 | https://bugzilla.suse.com/show_bug.cgi?id=1223692 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024050144-CVE-2024-26992-4f0e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2278316 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/9e985cbf2942a1bb8fcef9adc2a17d90fd7ca8ee | https://git.kernel.org/linus/c59a1f106f5cd4843c097069ff1bb2ad72103a67 | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-24.03-LTS:

10.openEuler-24.03-LTS-Next: