CVE-2026-53242 (GCVE-0-2026-53242)
Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-06-28 06:40
VLAI?
Title
ALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams
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.
Severity ?
7.8 (High)
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
9baee36e8c5443411c4629afabafaff8a46a23fd , < cac5bf3500ee6422cf64e0df0b5daeecfed42917
(git)
Affected: fc71f888994569f87d5bee20b1ac6c9c1e3a7a79 , < d842f26a167e77a36f3ed333b9fa99d36ef99fe6 (git) Affected: 629cf09464cf98670996ea5c191dc9743e6f3f00 , < d68b621bb5a48051932f1017a6e1bc9b18f854d0 (git) Affected: ae8f8d30d334bad5b1b3cdb1eb8a0b771f55e432 , < b053fcd8912f06c30f932f5b8ec41c72de474695 (git) Affected: 4a758e9a1f5ed722f83c4dd35f867fe811553bcb , < cd98837db15f323463b8df07282ac723bd5c3fed (git) Affected: 9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 , < 7c71a9522555ff137a9ca36b15d759ca04d84788 (git) Affected: 9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 , < 88fe2e3658726cb21ff2dcf9770bf672f9b9d31b (git) Affected: c2f64e05a0587a83ec42dbd6b7a7ded79b2ff694 (git) Affected: 5.10.253 , < 5.10.259 (semver) Affected: 6.1.167 , < 6.1.176 (semver) Affected: 6.6.130 , < 6.6.143 (semver) Affected: 6.12.78 , < 6.12.94 (semver) Affected: 6.18.19 , < 6.18.36 (semver) Affected: 6.19.9 , < 6.20 (semver) |
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{
"containers": {
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"programFiles": [
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{
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],
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"vendor": "Linux",
"versions": [
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},
{
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},
{
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},
{
"lessThanOrEqual": "6.12.*",
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},
{
"lessThanOrEqual": "6.18.*",
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"version": "6.18.36",
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},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.13",
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},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix"
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]
}
],
"cpeApplicability": [
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams\n\nsnd_pcm_drain() uses init_waitqueue_entry which does not clear\nentry.prev/next, and add_wait_queue with a conditional\nremove_wait_queue that is skipped when to_check is no longer\nin the group after concurrent UNLINK. The orphaned wait entry\nremains on the unlinked substream sleep queue. On the next\ndrain iteration, add_wait_queue adds the entry to a new queue\nwhile still linked on the old one, corrupting both lists. A\nsubsequent wake_up dereferences NULL at the func pointer\n(mapped from the spinlock at offset 0 of the misinterpreted\nwait_queue_head_t), causing a kernel panic.\n\nReplace init_waitqueue_entry/add_wait_queue/conditional\nremove_wait_queue with init_wait_entry/prepare_to_wait/\nfinish_wait. init_wait_entry clears prev/next via\nINIT_LIST_HEAD on each iteration and sets\nautoremove_wake_function which auto-removes the entry on\nwake-up. finish_wait safely handles both the already-removed\nand still-queued cases."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-06-28T06:40:49.406Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
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"url": "https://git.kernel.org/stable/c/cac5bf3500ee6422cf64e0df0b5daeecfed42917"
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{
"url": "https://git.kernel.org/stable/c/d842f26a167e77a36f3ed333b9fa99d36ef99fe6"
},
{
"url": "https://git.kernel.org/stable/c/d68b621bb5a48051932f1017a6e1bc9b18f854d0"
},
{
"url": "https://git.kernel.org/stable/c/b053fcd8912f06c30f932f5b8ec41c72de474695"
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{
"url": "https://git.kernel.org/stable/c/cd98837db15f323463b8df07282ac723bd5c3fed"
},
{
"url": "https://git.kernel.org/stable/c/7c71a9522555ff137a9ca36b15d759ca04d84788"
},
{
"url": "https://git.kernel.org/stable/c/88fe2e3658726cb21ff2dcf9770bf672f9b9d31b"
}
],
"title": "ALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams",
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"assignerShortName": "Linux",
"cveId": "CVE-2026-53242",
"datePublished": "2026-06-25T08:39:37.129Z",
"dateReserved": "2026-06-09T07:44:35.393Z",
"dateUpdated": "2026-06-28T06:40:49.406Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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