CVE-2026-64374

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the real-time (RT) task migration logic where the RT PUSH IPI mechanism, designed to reduce latency for PREEMPT RT, can cause a live lock on systems where PREEMPT RT is not enabled. In non-RT configurations, softirqs (software interrupt requests) run in an interrupt context. If a CPU is executing a softirq while RT tasks are queued, other CPUs may perceive it as overloaded and send Inter-Processor Interrupts (IPIs) to trigger a schedule. A high volume of these IPIs can delay the completion of the softirq, preventing the CPU from returning to task context and scheduling the RT tasks, effectively locking the CPU. This was observed in environments with heavy networking traffic on large machines.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.