CVE-2026-23221

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

18/02/2026

Last modified:

18/03/2026

Description

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

7.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	5.10 (including)	5.15.201 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.164 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.127 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.74 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.18.11 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.19 (including)	6.19.1 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-23221

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools