SB20260727197 - Deadlock in Linux kernel sched

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260727197

SB20260727197 - Deadlock in Linux kernel sched

Published: July 27, 2026

Security Bulletin ID SB20260727197
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) Deadlock (CVE-ID: CVE-2026-64374)

CWE-ID: CWE-833 - Deadlock

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 live lock condition in the linux kernel scheduler RT_PUSH_IPI logic when handling RT task migration and repeated inter-processor interrupts on non-PREEMPT_RT systems. A local user can trigger heavy networking activity and wake RT tasks to cause a denial of service.

The issue occurs on non-PREEMPT_RT systems when softirqs execute for long periods and prevent the target CPU from returning to task context.


Remediation

Install update from vendor's website.

References