SB20260502111 - Race condition in Linux kernel counter driver

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260502111

SB20260502111 - Race condition in Linux kernel counter driver

Published: May 2, 2026

Security Bulletin ID SB20260502111
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Race condition (CVE-ID: CVE-2026-31741)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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

The vulnerability exists due to improper state management in the rz-mtu3-cnt sysfs enable handler when processing repeated writes to the enable file. A local user can write repeated enable or disable values to cause a denial of service.

Writing 0 repeatedly can underflow the runtime PM usage count and lead to register access while clocks are off. Writing 0 while PWM is in progress can stop PWM without the counter owning the underlying MTU3 channel.


Remediation

Install update from vendor's website.

References