ALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams
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.
CVE-2026-53242
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-53242
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "9baee36e8c5443411c4629afabafaff8a46a23fd",
"lessThan": "cac5bf3500ee6422cf64e0df0b5daeecfed42917",
"versionType": "git"
},
{
"status": "affected",
"version": "f2cb2e0d27fb925c73a78f0ce7d6dbf68d3747c1",
"lessThan": "06eca2235a3fd281dddf25b0a97772b25b5bb573",
"versionType": "git"
},
{
"status": "affected",
"version": "fc71f888994569f87d5bee20b1ac6c9c1e3a7a79",
"lessThan": "d842f26a167e77a36f3ed333b9fa99d36ef99fe6",
"versionType": "git"
},
{
"status": "affected",
"version": "629cf09464cf98670996ea5c191dc9743e6f3f00",
"lessThan": "d68b621bb5a48051932f1017a6e1bc9b18f854d0",
"versionType": "git"
},
{
"status": "affected",
"version": "ae8f8d30d334bad5b1b3cdb1eb8a0b771f55e432",
"lessThan": "b053fcd8912f06c30f932f5b8ec41c72de474695",
"versionType": "git"
},
{
"status": "affected",
"version": "4a758e9a1f5ed722f83c4dd35f867fe811553bcb",
"lessThan": "cd98837db15f323463b8df07282ac723bd5c3fed",
"versionType": "git"
},
{
"status": "affected",
"version": "9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6",
"lessThan": "7c71a9522555ff137a9ca36b15d759ca04d84788",
"versionType": "git"
},
{
"status": "affected",
"version": "9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6",
"lessThan": "88fe2e3658726cb21ff2dcf9770bf672f9b9d31b",
"versionType": "git"
},
{
"status": "affected",
"version": "c2f64e05a0587a83ec42dbd6b7a7ded79b2ff694",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.253",
"lessThan": "5.10.259",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.167",
"lessThan": "6.1.176",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.130",
"lessThan": "6.6.143",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.78",
"lessThan": "6.12.94",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.19",
"lessThan": "6.18.36",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.19.9",
"lessThan": "6.20",
"versionType": "semver"
}
],
"programFiles": [
"sound/core/pcm_native.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.259",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.94",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.36",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.13",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/core/pcm_native.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53242
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40791 · Revision 1
- Added to Heist Feed
- Publisher date