CVE-2026-23221

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23221
In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc: fix use-after-free in driver_override_show() The driver_override_show() function reads the driver_override string without holding the device_lock. However, driver_override_store() uses driver_set_override(), which modifies and frees the string while holding the device_lock. This can result in a concurrent use-after-free if the string is freed by the store function while being read by the show function. Fix this by holding the device_lock around the read operation.

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/148891e95014b5dc5878acefa57f1940c281c431 Patch
https://git.kernel.org/stable/c/1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0 Patch
https://git.kernel.org/stable/c/a2ae33e1c6361e960a4d00f7cf75d880b54f9528 Patch
https://git.kernel.org/stable/c/b1983840287303e0dfb401b1b6cecc5ea7471e90 Patch
https://git.kernel.org/stable/c/c424e72cfa67e7e1477035058a8a659f2c0ea637 Patch
https://git.kernel.org/stable/c/c71dfb7833db7af652ee8f65011f14c97c47405d Patch
https://git.kernel.org/stable/c/dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227 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:*:*:*:*:*:*:*:*
History

18 Mar 2026, 14:50

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
CWE CWE-416
References () https://git.kernel.org/stable/c/148891e95014b5dc5878acefa57f1940c281c431 - () https://git.kernel.org/stable/c/148891e95014b5dc5878acefa57f1940c281c431 - Patch
References () https://git.kernel.org/stable/c/1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0 - () https://git.kernel.org/stable/c/1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0 - Patch
References () https://git.kernel.org/stable/c/a2ae33e1c6361e960a4d00f7cf75d880b54f9528 - () https://git.kernel.org/stable/c/a2ae33e1c6361e960a4d00f7cf75d880b54f9528 - Patch
References () https://git.kernel.org/stable/c/b1983840287303e0dfb401b1b6cecc5ea7471e90 - () https://git.kernel.org/stable/c/b1983840287303e0dfb401b1b6cecc5ea7471e90 - Patch
References () https://git.kernel.org/stable/c/c424e72cfa67e7e1477035058a8a659f2c0ea637 - () https://git.kernel.org/stable/c/c424e72cfa67e7e1477035058a8a659f2c0ea637 - Patch
References () https://git.kernel.org/stable/c/c71dfb7833db7af652ee8f65011f14c97c47405d - () https://git.kernel.org/stable/c/c71dfb7833db7af652ee8f65011f14c97c47405d - Patch
References () https://git.kernel.org/stable/c/dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227 - () https://git.kernel.org/stable/c/dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227 - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

23 Feb 2026, 04:16

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/148891e95014b5dc5878acefa57f1940c281c431 -
Summary
  • (es) Se ha resuelto la siguiente vulnerabilidad en el kernel de Linux: bus: fsl-mc: corrección de uso después de liberación en driver_override_show() La función driver_override_show() lee la cadena driver_override sin mantener el device_lock. Sin embargo, driver_override_store() utiliza driver_set_override(), que modifica y libera la cadena mientras mantiene el device_lock. Esto puede resultar en un uso después de liberación concurrente si la cadena es liberada por la función store mientras es leída por la función show. Solucionar esto manteniendo el device_lock alrededor de la operación de lectura.

19 Feb 2026, 16:27

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/b1983840287303e0dfb401b1b6cecc5ea7471e90 -
  • () https://git.kernel.org/stable/c/c424e72cfa67e7e1477035058a8a659f2c0ea637 -
  • () https://git.kernel.org/stable/c/c71dfb7833db7af652ee8f65011f14c97c47405d -
  • () https://git.kernel.org/stable/c/dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227 -

18 Feb 2026, 16:22

Type Values Removed Values Added
New CVE
Information

Published : 2026-02-18 16:22

Updated : 2026-03-18 14:50

NVD link : CVE-2026-23221

Mitre link : CVE-2026-23221

CVE.ORG link : CVE-2026-23221

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

Use After Free