VYPR
← All advisories
High severity7.8NVD Advisory· Published May 27, 2026· Updated May 30, 2026

CVE-2026-46090

CVE-2026-46090

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

152

Patches

Vulnerability mechanics

References

4

News mentions

0

No linked articles in our index yet.