SB20260919180 - Use-after-free in Linux kernel misc driver

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Main Vulnerability Database SB20260919180

SB20260919180 - Use-after-free in Linux kernel misc driver

Published: September 19, 2026

Security Bulletin ID SB20260919180
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-93051)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to use-after-free in the Linux kernel ad525x_dpot driver's sysfs attribute handling when removing a device without removing its command sysfs attributes before freeing driver data. A local user can access command sysfs attributes that remain exposed after the driver data is freed to cause a denial of service.

The command sysfs attributes are exposed only for devices supporting the F_CMD_INC feature.


Remediation

Install update from vendor's website.

References