CVE-2025-21682

一、漏洞信息
 漏洞编号：[CVE-2025-21682](https://nvd.nist.gov/vuln/detail/CVE-2025-21682)
 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:eth: bnxt: always recalculate features after XDP clearing, fix null-derefRecalculate features when XDP is detached.Before:  # ip li set dev eth0 xdp obj xdp_dummy.bpf.o sec xdp  # ip li set dev eth0 xdp off  # ethtool -k eth0 | grep gro  rx-gro-hw: off [requested on]After:  # ip li set dev eth0 xdp obj xdp_dummy.bpf.o sec xdp  # ip li set dev eth0 xdp off  # ethtool -k eth0 | grep gro  rx-gro-hw: onThe fact that HW-GRO doesn t get re-enabled automatically is justa minor annoyance. The real issue is that the features will randomlycome back during another reconfiguration which just happens to invokenetdev_update_features(). The driver doesn t handle reconfiguringtwo things at a time very robustly.Starting with commit 98ba1d931f61 ( bnxt_en: Fix RSS logic in__bnxt_reserve_rings() ) we only reconfigure the RSS hash tableif the  effective  number of Rx rings has changed. If HW-GRO isenabled  effective  number of rings is 2x what user sees.So if we are in the bad state, with HW-GRO re-enablement  pending after XDP off, and we lower the rings by / 2 - the HW-GRO ringsdoing 2x and the ethtool -L doing / 2 may cancel each other out,and the:  if (old_rx_rings != bp->hw_resc.resv_rx_rings &&condition in __bnxt_reserve_rings() will be false.The RSS map won t get updated, and we ll crash with:  BUG: kernel NULL pointer dereference, address: 0000000000000168  RIP: 0010:__bnxt_hwrm_vnic_set_rss+0x13a/0x1a0    bnxt_hwrm_vnic_rss_cfg_p5+0x47/0x180    __bnxt_setup_vnic_p5+0x58/0x110    bnxt_init_nic+0xb72/0xf50    __bnxt_open_nic+0x40d/0xab0    bnxt_open_nic+0x2b/0x60    ethtool_set_channels+0x18c/0x1d0As we try to access a freed ring.The issue is present since XDP support was added, really, butprior to commit 98ba1d931f61 ( bnxt_en: Fix RSS logic in__bnxt_reserve_rings() ) it wasn t causing major issues.
 漏洞公开时间：2025-01-31 20:15:29
 漏洞创建时间：2025-01-31 23:35:59
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2025-21682
<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/08831a894d18abfaabb5bbde7c2069a7fb41dd93 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/f0aa6a37a3dbb40b272df5fc6db93c114688adcd |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2025-21682 | https://bugzilla.suse.com/show_bug.cgi?id=1236703 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2025-21682 | https://bugzilla.suse.com/show_bug.cgi?id=1236703 |
| suse_bugzilla | https://git.kernel.org/stable/c/08831a894d18abfaabb5bbde7c2069a7fb41dd93 | https://bugzilla.suse.com/show_bug.cgi?id=1236703 |
| suse_bugzilla | https://git.kernel.org/stable/c/f0aa6a37a3dbb40b272df5fc6db93c114688adcd | https://bugzilla.suse.com/show_bug.cgi?id=1236703 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2025/CVE-2025-21682.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1236703 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2025013103-CVE-2025-21682-ccfd@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2343181 |

</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/08831a894d18abfaabb5bbde7c2069a7fb41dd93 |  | nvd |
|  |  | https://git.kernel.org/stable/c/f0aa6a37a3dbb40b272df5fc6db93c114688adcd |  | nvd |
| linux_kernel | 6.12.11 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=08831a894d18abfaabb5bbde7c2069a7fb41dd93Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1054aee82321483dceabbb9b9e5d6512e8fe684b | linuxkernelcves |
| linux_kernel | 6.13 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f0aa6a37a3dbb40b272df5fc6db93c114688adcdPlease | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1054aee82321483dceabbb9b9e5d6512e8fe684b | linuxkernelcves |

</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:eth: bnxt: always recalculate features after XDP clearing, fix null-derefRecalculate features when XDP is detached.Before:  # ip li set dev eth0 xdp obj xdp_dummy.bpf.o sec xdp  # ip li set dev eth0 xdp off  # ethtool -k eth0 | grep gro  rx-gro-hw: off [requested on]After:  # ip li set dev eth0 xdp obj xdp_dummy.bpf.o sec xdp  # ip li set dev eth0 xdp off  # ethtool -k eth0 | grep gro  rx-gro-hw: onThe fact that HW-GRO doesn&#39;t get re-enabled automatically is justa minor annoyance. The real issue is that the features will randomlycome back during another reconfiguration which just happens to invokenetdev_update_features(). The driver doesn&#39;t handle reconfiguringtwo things at a time very robustly.Starting with commit 98ba1d931f61 (&#34;bnxt_en: Fix RSS logic in__bnxt_reserve_rings()&#34;) we only reconfigure the RSS hash tableif the &#34;effective&#34; number of Rx rings has changed. If HW-GRO isenabled &#34;effective&#34; number of rings is 2x what user sees.So if we are in the bad state, with HW-GRO re-enablement &#34;pending&#34;after XDP off, and we lower the rings by / 2 - the HW-GRO ringsdoing 2x and the ethtool -L doing / 2 may cancel each other out,and the:  if (old_rx_rings != bp-&gt;hw_resc.resv_rx_rings &#38;&#38;condition in __bnxt_reserve_rings() will be false.The RSS map won&#39;t get updated, and we&#39;ll crash with:  BUG: kernel NULL pointer dereference, address: 0000000000000168  RIP: 0010:__bnxt_hwrm_vnic_set_rss+0x13a/0x1a0    bnxt_hwrm_vnic_rss_cfg_p5+0x47/0x180    __bnxt_setup_vnic_p5+0x58/0x110    bnxt_init_nic+0xb72/0xf50    __bnxt_open_nic+0x40d/0xab0    bnxt_open_nic+0x2b/0x60    ethtool_set_channels+0x18c/0x1d0As we try to access a freed ring.The issue is present since XDP support was added, really, butprior to commit 98ba1d931f61 (&#34;bnxt_en: Fix RSS logic in__bnxt_reserve_rings()&#34;) it wasn&#39;t causing major issues.The Linux kernel CVE team has assigned CVE-2025-21682 to this issue.
 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-20.03-LTS-SP4(4.19.90):受影响
2.openEuler-22.03-LTS-SP3(5.10.0):受影响
3.openEuler-22.03-LTS-SP4(5.10.0):受影响
4.openEuler-24.03-LTS(6.6.0):受影响
5.openEuler-24.03-LTS-SP1(6.6.0):受影响
6.openEuler-24.03-LTS-SP2(6.6.0):受影响
7.master(6.12.33):不受影响
8.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
  1.master(6.12.33):否
2.openEuler-20.03-LTS-SP4(4.19.90):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.openEuler-22.03-LTS-SP4(5.10.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):否
7.openEuler-24.03-LTS-SP1(6.6.0):否
8.openEuler-24.03-LTS-SP2(6.6.0):否

原因说明：
  1.openEuler-24.03-LTS(6.6.0):正常修复
2.openEuler-24.03-LTS-SP1(6.6.0):正常修复
3.openEuler-24.03-LTS-SP2(6.6.0):正常修复
4.openEuler-20.03-LTS-SP4(4.19.90):不修复-超出修复范围
5.openEuler-22.03-LTS-SP3(5.10.0):不修复-超出修复范围
6.openEuler-22.03-LTS-SP4(5.10.0):不修复-超出修复范围
7.master(6.12.33):不受影响-漏洞代码不能被攻击者触发
8.openEuler-24.03-LTS-Next(6.6.0):不受影响-漏洞代码不能被攻击者触发

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2025-1961

src-openEuler/kernel
关闭

内容风险标识

评论 (24)

src-openEuler/kernel关闭 .gitee-modal { width: 500px !important; }

内容风险标识

CVE-2025-21682

评论 (24)

搜索帮助

src-openEuler/kernel
关闭