kernel: ALSA: aloop: Fix racy access at PCM trigger

In the Linux kernel, the following vulnerability has been resolved: ALSA: aloop: Fix racy access at PCM trigger The PCM trigger callback of aloop driver tries to check the PCM state and stop the stream of the tied substream in the corresponding cable. Since both check and stop operations are...

CVE-2026-23191

CVE-2026-23191 (Linux kernel — ALSA aloop) resolves a race in the aloop PCM trigger path that could cause a use-after-free when repeatedly opening/closing the tied stream. The vulnerability occurs because the trigger callback checks the PCM state and stops the tied substream outside the cable loc...