CVE-2022-49096

一、漏洞信息
 漏洞编号：[CVE-2022-49096](https://nvd.nist.gov/vuln/detail/CVE-2022-49096)
 漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)
 漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.19,6.1.8,6.4.0,6.6.0
 CVSS V3.0分值：
  BaseScore：5.5 Medium
  Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:net: sfc: add missing xdp queue reinitializationAfter rx/tx ring buffer size is changed, kernel panic occurs whenit acts XDP_TX or XDP_REDIRECT.When tx/rx ring buffer size is changed(ethtool -G), sfc driverreallocates and reinitializes rx and tx queues and their buffer(tx_queue->buffer).But it misses reinitializing xdp queues(efx->xdp_tx_queues).So, while it is acting XDP_TX or XDP_REDIRECT, it uses the uninitializedtx_queue->buffer.A new function efx_set_xdp_channels() is separated from efx_set_channels()to handle only xdp queues.Splat looks like:   BUG: kernel NULL pointer dereference, address: 000000000000002a   #PF: supervisor write access in kernel mode   #PF: error_code(0x0002) - not-present page   PGD 0 P4D 0   Oops: 0002 [#4] PREEMPT SMP NOPTI   RIP: 0010:efx_tx_map_chunk+0x54/0x90 [sfc]   CPU: 2 PID: 0 Comm: swapper/2 Tainted: G      D           5.17.0+ #55 e8beeee8289528f11357029357cf   Code: 48 8b 8d a8 01 00 00 48 8d 14 52 4c 8d 2c d0 44 89 e0 48 85 c9 74 0e 44 89 e2 4c 89 f6 48 80   RSP: 0018:ffff92f121e45c60 EFLAGS: 00010297   RIP: 0010:efx_tx_map_chunk+0x54/0x90 [sfc]   RAX: 0000000000000040 RBX: ffff92ea506895c0 RCX: ffffffffc0330870   RDX: 0000000000000001 RSI: 00000001139b10ce RDI: ffff92ea506895c0   RBP: ffffffffc0358a80 R08: 00000001139b110d R09: 0000000000000000   R10: 0000000000000001 R11: ffff92ea414c0088 R12: 0000000000000040   R13: 0000000000000018 R14: 00000001139b10ce R15: ffff92ea506895c0   FS:  0000000000000000(0000) GS:ffff92f121ec0000(0000) knlGS:0000000000000000   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033   Code: 48 8b 8d a8 01 00 00 48 8d 14 52 4c 8d 2c d0 44 89 e0 48 85 c9 74 0e 44 89 e2 4c 89 f6 48 80   CR2: 000000000000002a CR3: 00000003e6810004 CR4: 00000000007706e0   RSP: 0018:ffff92f121e85c60 EFLAGS: 00010297   PKRU: 55555554   RAX: 0000000000000040 RBX: ffff92ea50689700 RCX: ffffffffc0330870   RDX: 0000000000000001 RSI: 00000001145a90ce RDI: ffff92ea50689700   RBP: ffffffffc0358a80 R08: 00000001145a910d R09: 0000000000000000   R10: 0000000000000001 R11: ffff92ea414c0088 R12: 0000000000000040   R13: 0000000000000018 R14: 00000001145a90ce R15: ffff92ea50689700   FS:  0000000000000000(0000) GS:ffff92f121e80000(0000) knlGS:0000000000000000   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033   CR2: 000000000000002a CR3: 00000003e6810005 CR4: 00000000007706e0   PKRU: 55555554   Call Trace:    <IRQ>    efx_xdp_tx_buffers+0x12b/0x3d0 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]    __efx_rx_packet+0x5c3/0x930 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]    efx_rx_packet+0x28c/0x2e0 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]    efx_ef10_ev_process+0x5f8/0xf40 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]    ? enqueue_task_fair+0x95/0x550    efx_poll+0xc4/0x360 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]
 漏洞公开时间：2025-02-26 15:00:47
 漏洞创建时间：2025-02-26 17:10:13
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2022-49096
<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/059a47f1da93811d37533556d67e72f2261b1127 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b8c46bc358d84701e7f7ffa054037db25f25da0e |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/dcc85e1593686e42c6749ef3d356db34759d59e8 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/ed7a824fda8732578d1014fad1f7fb0363705090 |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-49096 | https://bugzilla.suse.com/show_bug.cgi?id=1238077 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-49096.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1238077 |
| suse_bugzilla | https://git.kernel.org/stable/c/ed7a824fda8732578d1014fad1f7fb0363705090 | https://bugzilla.suse.com/show_bug.cgi?id=1238077 |
| suse_bugzilla | https://git.kernel.org/stable/c/b8c46bc358d84701e7f7ffa054037db25f25da0e | https://bugzilla.suse.com/show_bug.cgi?id=1238077 |
| suse_bugzilla | https://git.kernel.org/stable/c/dcc85e1593686e42c6749ef3d356db34759d59e8 | https://bugzilla.suse.com/show_bug.cgi?id=1238077 |
| suse_bugzilla | https://git.kernel.org/stable/c/059a47f1da93811d37533556d67e72f2261b1127 | https://bugzilla.suse.com/show_bug.cgi?id=1238077 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2347959 | https://bugzilla.suse.com/show_bug.cgi?id=1238077 |

</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  |
| ------- | -------- | ------- | -------- | --------- |
|  |  | https://git.kernel.org/stable/c/059a47f1da93811d37533556d67e72f2261b1127 |  | nvd |
|  |  | https://git.kernel.org/stable/c/b8c46bc358d84701e7f7ffa054037db25f25da0e |  | nvd |
|  |  | https://git.kernel.org/stable/c/dcc85e1593686e42c6749ef3d356db34759d59e8 |  | nvd |
|  |  | https://git.kernel.org/stable/c/ed7a824fda8732578d1014fad1f7fb0363705090 |  | nvd |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
  In the Linux kernel, the following vulnerability has been resolved:net: sfc: add missing xdp queue reinitializationAfter rx/tx ring buffer size is changed, kernel panic occurs whenit acts XDP_TX or XDP_REDIRECT.When tx/rx ring buffer size is changed(ethtool -G), sfc driverreallocates and reinitializes rx and tx queues and their buffer(tx_queue->buffer).But it misses reinitializing xdp queues(efx->xdp_tx_queues).So, while it is acting XDP_TX or XDP_REDIRECT, it uses the uninitializedtx_queue->buffer.A new function efx_set_xdp_channels() is separated from efx_set_channels()to handle only xdp queues.Splat looks like:   BUG: kernel NULL pointer dereference, address: 000000000000002a   #PF: supervisor write access in kernel mode   #PF: error_code(0x0002) - not-present page   PGD 0 P4D 0   Oops: 0002 [#4] PREEMPT SMP NOPTI   RIP: 0010:efx_tx_map_chunk+0x54/0x90 [sfc]   CPU: 2 PID: 0 Comm: swapper/2 Tainted: G      D           5.17.0+ #55 e8beeee8289528f11357029357cf   Code: 48 8b 8d a8 01 00 00 48 8d 14 52 4c 8d 2c d0 44 89 e0 48 85 c9 74 0e 44 89 e2 4c 89 f6 48 80   RSP: 0018:ffff92f121e45c60 EFLAGS: 00010297   RIP: 0010:efx_tx_map_chunk+0x54/0x90 [sfc]   RAX: 0000000000000040 RBX: ffff92ea506895c0 RCX: ffffffffc0330870   RDX: 0000000000000001 RSI: 00000001139b10ce RDI: ffff92ea506895c0   RBP: ffffffffc0358a80 R08: 00000001139b110d R09: 0000000000000000   R10: 0000000000000001 R11: ffff92ea414c0088 R12: 0000000000000040   R13: 0000000000000018 R14: 00000001139b10ce R15: ffff92ea506895c0   FS:  0000000000000000(0000) GS:ffff92f121ec0000(0000) knlGS:0000000000000000   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033   Code: 48 8b 8d a8 01 00 00 48 8d 14 52 4c 8d 2c d0 44 89 e0 48 85 c9 74 0e 44 89 e2 4c 89 f6 48 80   CR2: 000000000000002a CR3: 00000003e6810004 CR4: 00000000007706e0   RSP: 0018:ffff92f121e85c60 EFLAGS: 00010297   PKRU: 55555554   RAX: 0000000000000040 RBX: ffff92ea50689700 RCX: ffffffffc0330870   RDX: 0000000000000001 RSI: 00000001145a90ce RDI: ffff92ea50689700   RBP: ffffffffc0358a80 R08: 00000001145a910d R09: 0000000000000000   R10: 0000000000000001 R11: ffff92ea414c0088 R12: 0000000000000040   R13: 0000000000000018 R14: 00000001145a90ce R15: ffff92ea50689700   FS:  0000000000000000(0000) GS:ffff92f121e80000(0000) knlGS:0000000000000000   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033   CR2: 000000000000002a CR3: 00000003e6810005 CR4: 00000000007706e0   PKRU: 55555554   Call Trace:    <IRQ>    efx_xdp_tx_buffers+0x12b/0x3d0 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]    __efx_rx_packet+0x5c3/0x930 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]    efx_rx_packet+0x28c/0x2e0 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]    efx_ef10_ev_process+0x5f8/0xf40 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]    ? enqueue_task_fair+0x95/0x550    efx_poll+0xc4/0x360 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]
 openEuler评分：
  5.5
 Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
 受影响版本排查(受影响/不受影响)：
  1.openEuler-22.03-LTS-SP3:受影响
2.openEuler-22.03-LTS-SP4:受影响
3.openEuler-20.03-LTS-SP4:不受影响
4.master(6.6.0):不受影响
5.openEuler-24.03-LTS:不受影响
6.openEuler-24.03-LTS-Next:不受影响
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
  1.openEuler-20.03-LTS-SP4:否
2.openEuler-22.03-LTS-SP3:否
3.master(6.6.0):否
4.openEuler-24.03-LTS:否
5.openEuler-24.03-LTS-Next:否
6.openEuler-22.03-LTS-SP4:否
7.openEuler-24.03-LTS-SP1(6.6.0):否

原因说明：
  1.openEuler-22.03-LTS-SP3:不修复-超出修复范围
2.openEuler-22.03-LTS-SP4:不修复-超出修复范围
3.master(6.6.0):不受影响-漏洞代码不能被攻击者触发
4.openEuler-24.03-LTS-Next:不受影响-漏洞代码不能被攻击者触发
5.openEuler-20.03-LTS-SP4:不受影响-漏洞代码不存在
6.openEuler-24.03-LTS:不受影响-漏洞代码不存在
7.openEuler-24.03-LTS-SP1(6.6.0):不受影响-漏洞代码不存在

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2025-1284

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