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CVE-2026-89980: ALSA: harmony: initialize locks before requesting IRQ

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-10-30

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.

Affected products

• Linux: 2.6.12 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

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

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