CVE-2026-23318

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23318
In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Use correct version for UAC3 header validation The entry of the validators table for UAC3 AC header descriptor is defined with the wrong protocol version UAC_VERSION_2, while it should have been UAC_VERSION_3. This results in the validator never matching for actual UAC3 devices (protocol == UAC_VERSION_3), causing their header descriptors to bypass validation entirely. A malicious USB device presenting a truncated UAC3 header could exploit this to cause out-of-bounds reads when the driver later accesses unvalidated descriptor fields. The bug was introduced in the same commit as the recently fixed UAC3 feature unit sub-type typo, and appears to be from the same copy-paste error when the UAC3 section was created from the UAC2 section.

7.1 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f Patch
https://git.kernel.org/stable/c/1e5753ff4c2e86aa88516f97a224c90a3d0b133e Patch
https://git.kernel.org/stable/c/499ffd15b00dc91ac95c28f76959dfb5cdcc84d5 Patch
https://git.kernel.org/stable/c/54f9d645a5453d0bfece0c465d34aaf072ea99fa Patch
https://git.kernel.org/stable/c/82a7d0a1b88798de1a609130080ce0c65dd869e9 Patch
https://git.kernel.org/stable/c/8307d93e63d5f54ef10412d4db2dd551e920dee4 Patch
https://git.kernel.org/stable/c/a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7cc Patch
https://git.kernel.org/stable/c/d3904ca40515272681ae61ad6f561c24f190957f 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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
History

23 Apr 2026, 21:05

Type Values Removed Values Added
CWE CWE-125
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.1
First Time Linux
Linux linux Kernel
CPE cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.4:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f - () https://git.kernel.org/stable/c/0dcd1ed96c03459cf14706885c9dd3c1fd8bd29f - Patch
References () https://git.kernel.org/stable/c/1e5753ff4c2e86aa88516f97a224c90a3d0b133e - () https://git.kernel.org/stable/c/1e5753ff4c2e86aa88516f97a224c90a3d0b133e - Patch
References () https://git.kernel.org/stable/c/499ffd15b00dc91ac95c28f76959dfb5cdcc84d5 - () https://git.kernel.org/stable/c/499ffd15b00dc91ac95c28f76959dfb5cdcc84d5 - Patch
References () https://git.kernel.org/stable/c/54f9d645a5453d0bfece0c465d34aaf072ea99fa - () https://git.kernel.org/stable/c/54f9d645a5453d0bfece0c465d34aaf072ea99fa - Patch
References () https://git.kernel.org/stable/c/82a7d0a1b88798de1a609130080ce0c65dd869e9 - () https://git.kernel.org/stable/c/82a7d0a1b88798de1a609130080ce0c65dd869e9 - Patch
References () https://git.kernel.org/stable/c/8307d93e63d5f54ef10412d4db2dd551e920dee4 - () https://git.kernel.org/stable/c/8307d93e63d5f54ef10412d4db2dd551e920dee4 - Patch
References () https://git.kernel.org/stable/c/a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7cc - () https://git.kernel.org/stable/c/a0c6ae2ea84528f198bf7fd0117f12fd0cf6d7cc - Patch
References () https://git.kernel.org/stable/c/d3904ca40515272681ae61ad6f561c24f190957f - () https://git.kernel.org/stable/c/d3904ca40515272681ae61ad6f561c24f190957f - Patch

18 Apr 2026, 09:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/82a7d0a1b88798de1a609130080ce0c65dd869e9 -
  • () https://git.kernel.org/stable/c/8307d93e63d5f54ef10412d4db2dd551e920dee4 -
Summary
  • (es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: ALSA: usb-audio: Usar la versión correcta para la validación del encabezado UAC3 La entrada de la tabla de validadores para el descriptor de encabezado AC UAC3 está definida con la versión de protocolo incorrecta UAC_VERSION_2, mientras que debería haber sido UAC_VERSION_3. Esto resulta en que el validador nunca coincida para dispositivos UAC3 reales (protocolo == UAC_VERSION_3), haciendo que sus descriptores de encabezado omitan la validación por completo. Un dispositivo USB malicioso que presente un encabezado UAC3 truncado podría explotar esto para causar lecturas fuera de límites cuando el controlador acceda posteriormente a campos de descriptor no validados. El error fue introducido en el mismo commit que el error tipográfico del subtipo de unidad de característica UAC3 recientemente corregido, y parece provenir del mismo error de copiar y pegar cuando la sección UAC3 fue creada a partir de la sección UAC2.

25 Mar 2026, 11:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-25 11:16

Updated : 2026-04-23 21:05

NVD link : CVE-2026-23318

Mitre link : CVE-2026-23318

CVE.ORG link : CVE-2026-23318

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-125

Out-of-bounds Read