ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free()
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free() When snd_usb_create_mixer() fails, snd_usb_mixer_free() frees mixer->id_elems but the controls already added to the card still reference the freed memory. Later when snd_card_register() runs, the OSS mixer layer calls their callbacks and hits a use-after-free read. Call trace: get_ctl_value+0x63f/0x820 sound/usb/mixer.c:411 get_min_max_with_quirks.isra.0+0x240/0x1f40 sound/usb/mixer.c:1241 mixer_ctl_feature_info+0x26b/0x490 sound/usb/mixer.c:1381 snd_mixer_oss_build_test+0x174/0x3a0 sound/core/oss/mixer_oss.c:887 ... snd_card_register+0x4ed/0x6d0 sound/core/init.c:923 usb_audio_probe+0x5ef/0x2a90 sound/usb/card.c:1025 Fix by calling snd_ctl_remove() for all mixer controls before freeing id_elems. We save the next pointer first because snd_ctl_remove() frees the current element.
CVE-2026-23089
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-2026-23089
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": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "51b1aa6fe7dc87356ba58df06afb9677c9b841ea",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "56fb6efd5d04caf6f14994d51ec85393b9a896c6",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "7009daeefa945973a530b2f605fe445fc03747af",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "7bff0156d13f0ad9436e5178b979b063d59f572a",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "e6f103a22b08daf5df2f4aa158081840e5910963",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "dc1a5dd80af1ee1f29d8375b12dd7625f6294dad",
"versionType": "git"
},
{
"status": "affected",
"version": "6639b6c2367f884ca172b78d69f7da17bfab2e5e",
"lessThan": "930e69757b74c3ae083b0c3c7419bfe7f0edc7b2",
"versionType": "git"
}
],
"programFiles": [
"sound/usb/mixer.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.249",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.199",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.162",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.122",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.68",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.8",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/usb/mixer.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-23089
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #39747 · Revision 1
- Added to Heist Feed
- Publisher date