ALSA: pcm: wake linked drain waiters on unlink
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.
CVE-2026-80716
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-2026-80716
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": "f57f3df03a8e6010e321fa0258d3e054713c3cb7",
"lessThan": "c172e4c53321ee6429955295ea133bc3597a3ca9",
"versionType": "git"
},
{
"status": "affected",
"version": "f57f3df03a8e6010e321fa0258d3e054713c3cb7",
"lessThan": "3035bb784cea3f338934f5042dd3f35225a51b2e",
"versionType": "git"
},
{
"status": "affected",
"version": "f57f3df03a8e6010e321fa0258d3e054713c3cb7",
"lessThan": "1c1b7e8e545ce65e40f65b55c432765e058ea98f",
"versionType": "git"
},
{
"status": "affected",
"version": "f57f3df03a8e6010e321fa0258d3e054713c3cb7",
"lessThan": "e8b784a3f4fba3ea9c4d05138ecfa784a069627f",
"versionType": "git"
},
{
"status": "affected",
"version": "f57f3df03a8e6010e321fa0258d3e054713c3cb7",
"lessThan": "e8315330e4ec09c0cac625515400e13d0ee22b81",
"versionType": "git"
},
{
"status": "affected",
"version": "f57f3df03a8e6010e321fa0258d3e054713c3cb7",
"lessThan": "2940cc3cf43c72126b74ee6376314c195382023a",
"versionType": "git"
},
{
"status": "affected",
"version": "f57f3df03a8e6010e321fa0258d3e054713c3cb7",
"lessThan": "db09bc4ab19ce548a078240d2374792523953500",
"versionType": "git"
},
{
"status": "affected",
"version": "f57f3df03a8e6010e321fa0258d3e054713c3cb7",
"lessThan": "f495b6c4c8594122918552c9be2b51eb71647cd9",
"versionType": "git"
}
],
"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": "5.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/core/pcm_native.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80716
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34366 · Revision 1
- Added to Heist Feed
- Publisher date