ALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams
Summary
| CVE | CVE-2026-53242 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-06-25 09:16:42 UTC |
| Updated | 2026-06-25 09:16:42 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.001800000 probability, percentile 0.077700000 (date 2026-06-25)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 9baee36e8c5443411c4629afabafaff8a46a23fd cac5bf3500ee6422cf64e0df0b5daeecfed42917 git | Not specified |
| CNA | Linux | Linux | affected fc71f888994569f87d5bee20b1ac6c9c1e3a7a79 d842f26a167e77a36f3ed333b9fa99d36ef99fe6 git | Not specified |
| CNA | Linux | Linux | affected 629cf09464cf98670996ea5c191dc9743e6f3f00 d68b621bb5a48051932f1017a6e1bc9b18f854d0 git | Not specified |
| CNA | Linux | Linux | affected ae8f8d30d334bad5b1b3cdb1eb8a0b771f55e432 b053fcd8912f06c30f932f5b8ec41c72de474695 git | Not specified |
| CNA | Linux | Linux | affected 4a758e9a1f5ed722f83c4dd35f867fe811553bcb cd98837db15f323463b8df07282ac723bd5c3fed git | Not specified |
| CNA | Linux | Linux | affected 9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 7c71a9522555ff137a9ca36b15d759ca04d84788 git | Not specified |
| CNA | Linux | Linux | affected 9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 88fe2e3658726cb21ff2dcf9770bf672f9b9d31b git | Not specified |
| CNA | Linux | Linux | affected c2f64e05a0587a83ec42dbd6b7a7ded79b2ff694 git | Not specified |
| CNA | Linux | Linux | affected 5.10.253 5.10.259 semver | Not specified |
| CNA | Linux | Linux | affected 6.1.167 6.1.176 semver | Not specified |
| CNA | Linux | Linux | affected 6.6.130 6.6.143 semver | Not specified |
| CNA | Linux | Linux | affected 6.12.78 6.12.94 semver | Not specified |
| CNA | Linux | Linux | affected 6.18.19 6.18.36 semver | Not specified |
| CNA | Linux | Linux | affected 6.19.9 6.20 semver | Not specified |
| CNA | Linux | Linux | affected 7.0 | Not specified |
| CNA | Linux | Linux | unaffected 7.0 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.259 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.176 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.143 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.94 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.36 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.13 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/d68b621bb5a48051932f1017a6e1bc9b18f854d0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7c71a9522555ff137a9ca36b15d759ca04d84788 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b053fcd8912f06c30f932f5b8ec41c72de474695 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/cac5bf3500ee6422cf64e0df0b5daeecfed42917 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/cd98837db15f323463b8df07282ac723bd5c3fed | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d842f26a167e77a36f3ed333b9fa99d36ef99fe6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/88fe2e3658726cb21ff2dcf9770bf672f9b9d31b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.