CVE-2025-71239 Details
Description
In the Linux kernel, the following vulnerability has been resolved: audit: add fchmodat2() to change attributes class fchmodat2(), introduced in version 6.6 is currently not in the change attribute class of audit. Calling fchmodat2() to change a file attribute in the same fashion than chmod() or fchmodat() will bypass audit rules such as: -w /tmp/test -p rwa -k test_rwa The current patch adds fchmodat2() to the change attributes class.
A vulnerability in the Linux kernel's audit subsystem allows the new fchmodat2() system call, introduced in version 6.6, to bypass audit rules. This issue arises because fchmodat2() was not included in the audit's change attributes class, unlike its predecessor fchmodat(). As a result, actions performed with fchmodat2() do not trigger the expected audit notifications, creating a stealthy method to change file permissions without detection. This vulnerability affects Linux kernel versions 6.6 and 6.12, as well as several other versions within the 5.x and 6.x ranges.
Users are advised to update to Linux kernel versions 7.0 or later, where this vulnerability has been fixed. For those on LTS versions, the patch is available in the latest updates.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/3e762a03713e8c25ca0108c075d662c897fc0623 | kernel.org | Patch |
| https://git.kernel.org/stable/c/4f493a6079b588cf1f04ce5ed6cdad45ab0d53dc | kernel.org | Patch |
| https://git.kernel.org/stable/c/4fed776ca86378da7dd743a7b648e20b025ba8ef | kernel.org | Patch |
| https://git.kernel.org/stable/c/91e27bc79c3bca93c06bf5a471d47df9a35b3741 | kernel.org | Patch |
| https://git.kernel.org/stable/c/c4334c0d0e7d6f02ed93756fd4ba807e3d00c05f | kernel.org | Patch |
| https://www.bencteux.fr/posts/missing_syscalls_audit/ | kernel.org | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.6, < 6.6.128 >= 6.7, < 6.12.75 >= 6.13, < 6.18.16 >= 6.19, < 6.19.6 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 20, 2026 | Initial Analysis | [email protected] |
| Mar 18, 2026 | CVE Modified | kernel.org |
| Mar 17, 2026 | New CVE Received | kernel.org |