SB20260528112 - Out-of-bounds write in Linux kernel cpuidle driver

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Main Vulnerability Database SB20260528112

SB20260528112 - Out-of-bounds write in Linux kernel cpuidle driver

Published: May 28, 2026

Security Bulletin ID SB20260528112
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) Out-of-bounds write (CVE-ID: CVE-2026-45968)

CWE-ID: CWE-787 - Out-of-bounds write

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 attacker to cause a denial of service.

The vulnerability exists due to an out-of-bounds index in the cpuidle ladder governor when selecting an idle state on systems with only one available idle state. A local attacker can trigger the vulnerable code path to cause a denial of service.

This issue occurs on certain platforms where cpuidle registers only a single polling idle state, which can result in a NULL enter callback being invoked and a system crash.


Remediation

Install update from vendor's website.

References