Tracker / CVE-2026-46090
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.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 2.6.37 → 5.10.259 |
| linux | linux_kernel · 5.11 → 5.15.210 |
| linux | linux_kernel · 5.16 → 6.12.88 |
| linux | linux_kernel · 6.13 → 6.18.27 |
| linux | linux_kernel · 6.19 → 7.0.4 |