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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-46090

ALSA: aloop: Fix peer runtime UAF during format-change stop

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 597603d615d2b19a9e451d8cfac24372856a522d to < 83bd62fa9620ac98d5d694bde14c50f98c8e7189affected
  • 597603d615d2b19a9e451d8cfac24372856a522d to < 345c24b2bcf0923dfae1ab41497351c68214ff76affected
  • 597603d615d2b19a9e451d8cfac24372856a522d to < 3727a3541788412c393eec236ad228d72efe19c7affected
  • 597603d615d2b19a9e451d8cfac24372856a522d to < d258cdce50ff3e02392917258e81a0ce9555c327affected
  • 597603d615d2b19a9e451d8cfac24372856a522d to < 03f52a9c170431e8f10e156b9dc0dae80b3e9198affected
  • 597603d615d2b19a9e451d8cfac24372856a522d to < bdd9503c3d222d2735b56c7a8b4422ccf3de6e5caffected
  • 597603d615d2b19a9e451d8cfac24372856a522d to < 5d45e34bf001344e2966dabca1897561bbc9e913affected
  • 597603d615d2b19a9e451d8cfac24372856a522d to < e5c33cdc6f402eab8abd36ecf436b22c9d3a8affaffected

Linux Linux

Default version status: affected

  • 2.6.37affected
  • 0 to < 2.6.37unaffected
  • 5.10.259 to ≤ 5.10.*unaffected
  • 5.15.210 to ≤ 5.15.*unaffected
  • 6.1.188 to ≤ 6.1.*unaffected
  • 6.6.157 to ≤ 6.6.*unaffected
  • 6.12.88 to ≤ 6.12.*unaffected
  • 6.18.27 to ≤ 6.18.*unaffected
  • 7.0.4 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References