CVE-2026-46090

In the Linux kernel, the following vulnerability has been resolved: ALSA: aloop: Fix peer runtime UAF during format-change stop loopback_check_format() may stop the capture side when playback starts with parameters that no longer match a running capture stream. Commit 826af7fa62e3 ("ALSA: aloop: Fix racy access at PCM trigger") moved the peer lookup under cable->lock, but the actual snd_pcm_stop() still runs after dropping that lock. A concurrent close can clear the capture entry from cable->streams[] and detach or free its runtime while the playback trigger path still holds a stale peer substream pointer. Keep a per-cable count of in-flight peer stops before dropping cable->lock, and make free_cable() wait for those stops before detaching the runtime. This preserves the existing behavior while making the peer runtime lifetime explicit.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

0.1% chance of exploitation in the next 30 days; higher than 0% of CVEs (scores of 2026-10-25)

CWEs

CWE-416, CWE-364

Published

2026-05-27

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

Affected

• linux:linux_kernel

References

• https://git.kernel.org/stable/c/03f52a9c170431e8f10e156b9dc0dae80b3e9198
• https://git.kernel.org/stable/c/345c24b2bcf0923dfae1ab41497351c68214ff76
• https://git.kernel.org/stable/c/3727a3541788412c393eec236ad228d72efe19c7
• https://git.kernel.org/stable/c/5d45e34bf001344e2966dabca1897561bbc9e913
• https://git.kernel.org/stable/c/83bd62fa9620ac98d5d694bde14c50f98c8e7189

Check your stackJSON