Skip to main content
cve.nowby Sazabi
← All vulnerabilities
CVE-2026-53242

ALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.259, 6.1.176, 6.6.143, 6.12.94, 6.18.36, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

In the Linux kernel, the following vulnerability has been resolved: ALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams snd_pcm_drain() uses init_waitqueue_entry which does not clear entry.prev/next, and add_wait_queue with a conditional remove_wait_queue that is skipped when to_check is no longer in the group after concurrent UNLINK. The orphaned wait entry remains on the unlinked substream sleep queue. On the next drain iteration, add_wait_queue adds the entry to a new queue while still linked on the old one, corrupting both lists. A subsequent wake_up dereferences NULL at the func pointer (mapped from the spinlock at offset 0 of the misinterpreted wait_queue_head_t), causing a kernel panic. Replace init_waitqueue_entry/add_wait_queue/conditional remove_wait_queue with init_wait_entry/prepare_to_wait/ finish_wait. init_wait_entry clears prev/next via INIT_LIST_HEAD on each iteration and sets autoremove_wake_function which auto-removes the entry on wake-up. finish_wait safely handles both the already-removed and still-queued cases.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 9baee36e8c5443411c4629afabafaff8a46a23fd · fixed in cac5bf3500ee6422cf64e0df0b5daeecfed42917; From f2cb2e0d27fb925c73a78f0ce7d6dbf68d3747c1 · fixed in 06eca2235a3fd281dddf25b0a97772b25b5bb573; From fc71f888994569f87d5bee20b1ac6c9c1e3a7a79 · fixed in d842f26a167e77a36f3ed333b9fa99d36ef99fe6; From 629cf09464cf98670996ea5c191dc9743e6f3f00 · fixed in d68b621bb5a48051932f1017a6e1bc9b18f854d0; From ae8f8d30d334bad5b1b3cdb1eb8a0b771f55e432 · fixed in b053fcd8912f06c30f932f5b8ec41c72de474695; From 4a758e9a1f5ed722f83c4dd35f867fe811553bcb · fixed in cd98837db15f323463b8df07282ac723bd5c3fed; From 9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 · fixed in 7c71a9522555ff137a9ca36b15d759ca04d84788; From 9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 · fixed in 88fe2e3658726cb21ff2dcf9770bf672f9b9d31b; From 5.10.253 · fixed in 5.10.259; From 6.1.167 · fixed in 6.1.176; From 6.6.130 · fixed in 6.6.143; From 6.12.78 · fixed in 6.12.94; From 6.18.19 · fixed in 6.18.36; From 6.19.9 · fixed in 6.20

  • Linux Linux

    7.0

  • KernelLinux

    fixed in 5.10.259; From 5.11.0 · fixed in 6.1.176; From 6.2.0 · fixed in 6.6.143; From 6.7.0 · fixed in 6.12.94; From 6.13.0 · fixed in 6.18.36; From 6.19.0 · fixed in 7.0.13

References 8

git.kernel.org