CVE-2026-64250

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

Description An issue exists in the LoongArch architecture where the stop this cpu() function marks CPUs as offline for the scheduler using set cpu online(false) but fails to notify the Read-Copy-Update (RCU) mechanism. Consequently, RCU continues to wait for a quiescent state from CPUs that are spinning with interrupts disabled. This can lead to a system hang during reboot, shutdown, or halt sequences if irq work sync() is called, as it triggers synchronize rcu() on architectures where arch irq work has interrupt() returns false, causing the process to block on a grace period that never completes.

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