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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-80716

ALSA: pcm: wake linked drain waiters on unlink

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: wake linked drain waiters on unlink snd_pcm_drain() on a linked stream parks an on-stack wait entry on the drained peer's runtime->sleep, and after schedule_timeout() removes it only if that peer is still found in the caller's group. If group membership changes during the wait and the sleep ends by signal or timeout (so autoremove_wake_function() does not run), finish_wait() is skipped and snd_pcm_drain() returns with the entry still queued on that stream's sleep list; a later wake_up() then walks a freed stack frame. This is reachable by unlinking either the drained or the draining stream. Unlike the close path (snd_pcm_drop() -> snd_pcm_post_stop()), snd_pcm_unlink() never wakes the sleep queues. Wake every group member under the group lock before the membership change, so a linked drainer is released and drops its entry while the streams are still grouped. The window was opened when snd_pcm_link_rwsem stopped being held across the wait and the removal became conditional on group membership (see Fixes). The later switch to finish_wait() kept that conditional removal, so the signal/timeout case remained.

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

  • f57f3df03a8e6010e321fa0258d3e054713c3cb7 to < c172e4c53321ee6429955295ea133bc3597a3ca9affected
  • f57f3df03a8e6010e321fa0258d3e054713c3cb7 to < 3035bb784cea3f338934f5042dd3f35225a51b2eaffected
  • f57f3df03a8e6010e321fa0258d3e054713c3cb7 to < 1c1b7e8e545ce65e40f65b55c432765e058ea98faffected
  • f57f3df03a8e6010e321fa0258d3e054713c3cb7 to < e8b784a3f4fba3ea9c4d05138ecfa784a069627faffected
  • f57f3df03a8e6010e321fa0258d3e054713c3cb7 to < e8315330e4ec09c0cac625515400e13d0ee22b81affected
  • f57f3df03a8e6010e321fa0258d3e054713c3cb7 to < 2940cc3cf43c72126b74ee6376314c195382023aaffected
  • f57f3df03a8e6010e321fa0258d3e054713c3cb7 to < db09bc4ab19ce548a078240d2374792523953500affected
  • f57f3df03a8e6010e321fa0258d3e054713c3cb7 to < f495b6c4c8594122918552c9be2b51eb71647cd9affected

Linux Linux

Default version status: affected

  • 5.1affected
  • 0 to < 5.1unaffected
  • 5.10.265 to ≤ 5.10.*unaffected
  • 5.15.216 to ≤ 5.15.*unaffected
  • 6.1.183 to ≤ 6.1.*unaffected
  • 6.6.151 to ≤ 6.6.*unaffected
  • 6.12.103 to ≤ 6.12.*unaffected
  • 6.18.44 to ≤ 6.18.*unaffected
  • 7.1.8 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References