ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-23089
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-02-04 17:16:19 UTC
Updated2026-10-19 19:17:35 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-416 | CWE-416 CWE-416 Use After Free

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 6639b6c2367f884ca172b78d69f7da17bfab2e5e 51b1aa6fe7dc87356ba58df06afb9677c9b841ea git Not specified
CNA Linux Linux affected 6639b6c2367f884ca172b78d69f7da17bfab2e5e 56fb6efd5d04caf6f14994d51ec85393b9a896c6 git Not specified
CNA Linux Linux affected 6639b6c2367f884ca172b78d69f7da17bfab2e5e 7009daeefa945973a530b2f605fe445fc03747af git Not specified
CNA Linux Linux affected 6639b6c2367f884ca172b78d69f7da17bfab2e5e 7bff0156d13f0ad9436e5178b979b063d59f572a git Not specified
CNA Linux Linux affected 6639b6c2367f884ca172b78d69f7da17bfab2e5e e6f103a22b08daf5df2f4aa158081840e5910963 git Not specified
CNA Linux Linux affected 6639b6c2367f884ca172b78d69f7da17bfab2e5e dc1a5dd80af1ee1f29d8375b12dd7625f6294dad git Not specified
CNA Linux Linux affected 6639b6c2367f884ca172b78d69f7da17bfab2e5e 930e69757b74c3ae083b0c3c7419bfe7f0edc7b2 git Not specified
CNA Linux Linux affected 2.6.13 Not specified
CNA Linux Linux unaffected 2.6.13 semver Not specified
CNA Linux Linux unaffected 5.10.249 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.199 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.162 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.122 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.68 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.8 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/51b1aa6fe7dc87356ba58df06afb9677c9b841ea 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/56fb6efd5d04caf6f14994d51ec85393b9a896c6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/7009daeefa945973a530b2f605fe445fc03747af 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/7bff0156d13f0ad9436e5178b979b063d59f572a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/dc1a5dd80af1ee1f29d8375b12dd7625f6294dad 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/930e69757b74c3ae083b0c3c7419bfe7f0edc7b2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e6f103a22b08daf5df2f4aa158081840e5910963 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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