CVE-2025-21654

一、漏洞信息
 漏洞编号：[CVE-2025-21654](https://nvd.nist.gov/vuln/detail/CVE-2025-21654)
 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:ovl: support encoding fid from inode with no aliasDmitry Safonov reported that a WARN_ON() assertion can be trigered byuserspace when calling inotify_show_fdinfo() for an overlayfs watchedinode, whose dentry aliases were discarded with drop_caches.The WARN_ON() assertion in inotify_show_fdinfo() was removed, becauseit is possible for encoding file handle to fail for other reason, butthe impact of failing to encode an overlayfs file handle goes beyondthis assertion.As shown in the LTP test case mentioned in the link below, failure toencode an overlayfs file handle from a non-aliased inode also leads tofailure to report an fid with FAN_DELETE_SELF fanotify events.As Dmitry notes in his analyzis of the problem, ovl_encode_fh() failsif it cannot find an alias for the inode, but this failure can be fixed.ovl_encode_fh() seldom uses the alias and in the case of non-decodablefile handles, as is often the case with fanotify fid info,ovl_encode_fh() never needs to use the alias to encode a file handle.Defer finding an alias until it is actually needed so ovl_encode_fh()will not fail in the common case of FAN_DELETE_SELF fanotify events.
 漏洞公开时间：2025-01-19 19:15:11
 漏洞创建时间：2025-01-19 20:22:10
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2025-21654
<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/3c7c90274ae339e1ad443c9be1c67a20b80b9c76 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/c45beebfde34aa71afbc48b2c54cdda623515037 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/f0c0ac84de17c37e6e84da65fb920f91dada55ad |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2025-21654 | https://bugzilla.suse.com/show_bug.cgi?id=1236162 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2025/CVE-2025-21654.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1236162 |
| suse_bugzilla | https://git.kernel.org/stable/c/a1a541fbfa7e97c1100144db34b57553d7164ce5 | https://bugzilla.suse.com/show_bug.cgi?id=1236162 |
| suse_bugzilla | https://git.kernel.org/stable/c/3c7c90274ae339e1ad443c9be1c67a20b80b9c76 | https://bugzilla.suse.com/show_bug.cgi?id=1236162 |
| suse_bugzilla | https://git.kernel.org/stable/c/c45beebfde34aa71afbc48b2c54cdda623515037 | https://bugzilla.suse.com/show_bug.cgi?id=1236162 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2025-21654 | https://bugzilla.suse.com/show_bug.cgi?id=1236162 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2338833 | https://bugzilla.suse.com/show_bug.cgi?id=1236162 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2025011947-CVE-2025-21654-5eac@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2338833 |
| anolis |  | https://anas.openanolis.cn/cves/detail/CVE-2025-21654 |
| mageia |  | http://advisories.mageia.org/MGASA-2025-0030.html |

</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_kernel | 6.6.72 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=a1a541fbfa7e97c1100144db34b57553d7164ce5Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=16aac5ad1fa94894b798dd522c5c3a6a0628d7f0 | linuxkernelcves |
| linux_kernel | 6.12.10 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3c7c90274ae339e1ad443c9be1c67a20b80b9c76Issue | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=16aac5ad1fa94894b798dd522c5c3a6a0628d7f0 | linuxkernelcves |
| linux_kernel | 6.13-rc7 | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=c45beebfde34aa71afbc48b2c54cdda623515037Please | https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=16aac5ad1fa94894b798dd522c5c3a6a0628d7f0 | linuxkernelcves |

</details>

二、漏洞分析结构反馈
 影响性分析说明：
  Reserved.
 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-24.03-LTS(6.6.0):受影响
2.openEuler-24.03-LTS-SP1(6.6.0):受影响
3.openEuler-20.03-LTS-SP4(4.19.90):不受影响
4.openEuler-22.03-LTS-SP3(5.10.0):不受影响
5.openEuler-22.03-LTS-SP4:不受影响
6.master(6.6.0):不受影响
7.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：
  1.openEuler-20.03-LTS-SP4(4.19.90):否
2.openEuler-22.03-LTS-SP3(5.10.0):否
3.master(6.6.0):否
4.openEuler-24.03-LTS(6.6.0):否
5.openEuler-24.03-LTS-Next(6.6.0):否
6.openEuler-22.03-LTS-SP4:否
7.openEuler-24.03-LTS-SP1(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.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(6.6.0):不受影响-漏洞代码不能被攻击者触发
5.openEuler-20.03-LTS-SP4(4.19.90):不受影响-漏洞代码不存在
6.openEuler-22.03-LTS-SP3(5.10.0):不受影响-漏洞代码不存在
7.openEuler-22.03-LTS-SP4: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-2025-1321

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