High 7.8Published Feb 4, 2026

CVE-2026-23089ALSA: usb-audio: Fix use-after-free in snd_usb_mixer_free()

Updated under an hour ago (Oct 26, 2026, 10:30 PM ET)

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	6639b6c2367f884ca172b78d69f7da17bfab2e5e builds before 51b1aa6fe7dc87356ba58df06afb9677c9b841ea; 6639b6c2367f884ca172b78d69f7da17bfab2e5e builds before 56fb6efd5d04caf6f14994d51ec85393b9a896c6; from 6639b6c2367f884ca172b78d69f7da17bfab2e5e before 7009daeefa945973a530b2f605fe445fc03747af; 6639b6c2367f884ca172b78d69f7da17bfab2e5e builds before 7bff0156d13f0ad9436e5178b979b063d59f572a; from 6639b6c2367f884ca172b78d69f7da17bfab2e5e before e6f103a22b08daf5df2f4aa158081840e5910963; from 6639b6c2367f884ca172b78d69f7da17bfab2e5e before dc1a5dd80af1ee1f29d8375b12dd7625f6294dad; 6639b6c2367f884ca172b78d69f7da17bfab2e5e builds before 930e69757b74c3ae083b0c3c7419bfe7f0edc7b2	CNA record
linux linux_kernel linux:linux_kernel	from 2.6.13 before 5.10.249; from 5.11 before 5.15.199; from 5.16 before 6.1.162; from 6.2 before 6.6.122; from 6.7 before 6.12.68; from 6.13 before 6.18.8; 6.19; 6.19; and 4 more ranges	NVD

References

References

https://git.kernel.org/stable/c/51b1aa6fe7dc87356ba58df06afb9677c9b841ea	patch
https://git.kernel.org/stable/c/56fb6efd5d04caf6f14994d51ec85393b9a896c6	patch
https://git.kernel.org/stable/c/7009daeefa945973a530b2f605fe445fc03747af	patch
https://git.kernel.org/stable/c/7bff0156d13f0ad9436e5178b979b063d59f572a	patch
https://git.kernel.org/stable/c/e6f103a22b08daf5df2f4aa158081840e5910963	patch
https://git.kernel.org/stable/c/dc1a5dd80af1ee1f29d8375b12dd7625f6294dad	patch
https://git.kernel.org/stable/c/930e69757b74c3ae083b0c3c7419bfe7f0edc7b2	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.