SB20260528164 - Always-Incorrect Control Flow Implementation in Linux kernel sched

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Main Vulnerability Database SB20260528164

SB20260528164 - Always-Incorrect Control Flow Implementation in Linux kernel sched

Published: May 28, 2026

Security Bulletin ID SB20260528164
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) Always-Incorrect Control Flow Implementation (CVE-ID: CVE-2026-45919)

CWE-ID: CWE-670 - Always-Incorrect Control Flow Implementation

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 logic in rto_next_cpu() when handling RT load balancing on an overloaded CPU. A local user can trigger repeated self-IPIs to cause a denial of service.

The issue can lead to a CPU hardlockup when HAVE_RT_PUSH_IPI is enabled and the affected CPU remains overloaded while other CPUs run pull_rt_task().


Remediation

Install update from vendor's website.

References