SB20260727196 - Race condition in Linux kernel cpufreq driver

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Main Vulnerability Database SB20260727196

SB20260727196 - Race condition in Linux kernel cpufreq driver

Published: July 27, 2026

Security Bulletin ID SB20260727196
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-2026-64373)

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

CVSSv4: 6.8 [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]


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

The vulnerability exists due to a race condition in cpufreq_suspend() when rebooting the system while cpu hotplug operations run concurrently. A local user can trigger a reboot while concurrent cpu hotplug activity causes governor_data to be freed during access to cause a denial of service.

The issue can result in a kernel null pointer dereference during the reboot path because processes and kernel threads remain active.


Remediation

Install update from vendor's website.

References