CVE-2026-23089

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23089
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.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
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/930e69757b74c3ae083b0c3c7419bfe7f0edc7b2 Patch
https://git.kernel.org/stable/c/dc1a5dd80af1ee1f29d8375b12dd7625f6294dad Patch
https://git.kernel.org/stable/c/e6f103a22b08daf5df2f4aa158081840e5910963 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
History

17 Mar 2026, 21:09

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ALSA: usb-audio: Corrección de uso después de liberación en snd_usb_mixer_free() Cuando snd_usb_create_mixer() falla, snd_usb_mixer_free() libera mixer->id_elems, pero los controles ya añadidos a la tarjeta siguen referenciando la memoria liberada. Más tarde, cuando se ejecuta snd_card_register(), la capa del mezclador OSS llama a sus retrollamadas y se produce una lectura de uso después de liberación. Traza de llamada: 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 Se corrige llamando a snd_ctl_remove() para todos los controles del mezclador antes de liberar id_elems. Guardamos el siguiente puntero primero porque snd_ctl_remove() libera el elemento actual.
CWE CWE-416
CPE cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/51b1aa6fe7dc87356ba58df06afb9677c9b841ea - () https://git.kernel.org/stable/c/51b1aa6fe7dc87356ba58df06afb9677c9b841ea - Patch
References () https://git.kernel.org/stable/c/56fb6efd5d04caf6f14994d51ec85393b9a896c6 - () https://git.kernel.org/stable/c/56fb6efd5d04caf6f14994d51ec85393b9a896c6 - Patch
References () https://git.kernel.org/stable/c/7009daeefa945973a530b2f605fe445fc03747af - () https://git.kernel.org/stable/c/7009daeefa945973a530b2f605fe445fc03747af - Patch
References () https://git.kernel.org/stable/c/7bff0156d13f0ad9436e5178b979b063d59f572a - () https://git.kernel.org/stable/c/7bff0156d13f0ad9436e5178b979b063d59f572a - Patch
References () https://git.kernel.org/stable/c/930e69757b74c3ae083b0c3c7419bfe7f0edc7b2 - () https://git.kernel.org/stable/c/930e69757b74c3ae083b0c3c7419bfe7f0edc7b2 - Patch
References () https://git.kernel.org/stable/c/dc1a5dd80af1ee1f29d8375b12dd7625f6294dad - () https://git.kernel.org/stable/c/dc1a5dd80af1ee1f29d8375b12dd7625f6294dad - Patch
References () https://git.kernel.org/stable/c/e6f103a22b08daf5df2f4aa158081840e5910963 - () https://git.kernel.org/stable/c/e6f103a22b08daf5df2f4aa158081840e5910963 - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
First Time Linux
Linux linux Kernel

06 Feb 2026, 17:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/51b1aa6fe7dc87356ba58df06afb9677c9b841ea -
  • () https://git.kernel.org/stable/c/56fb6efd5d04caf6f14994d51ec85393b9a896c6 -
  • () https://git.kernel.org/stable/c/7009daeefa945973a530b2f605fe445fc03747af -

04 Feb 2026, 17:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-04 17:16

Updated : 2026-03-17 21:09

NVD link : CVE-2026-23089

Mitre link : CVE-2026-23089

CVE.ORG link : CVE-2026-23089

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

Use After Free