CVE-2026-31480

Description

In the Linux kernel, the following vulnerability has been resolved: tracing: Fix potential deadlock in cpu hotplug with osnoise The following sequence may leads deadlock in cpu hotplug: task1 task2 task3 ----- ----- ----- mutex_lock(&interface_lock) [CPU GOING OFFLINE] cpus_write_lock(); osnoise_cpu_die(); kthread_stop(task3); wait_for_completion(); osnoise_sleep(); mutex_lock(&interface_lock); cpus_read_lock(); [DEAD LOCK] Fix by swap the order of cpus_read_lock() and mutex_lock(&interface_lock).

References

• https://git.kernel.org/stable/c/03474a01c199de17a8e2d39b51df6beb9c76e831
• https://git.kernel.org/stable/c/1f9885732248d22f788e4992c739a98c88ab8a55
• https://git.kernel.org/stable/c/7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f
• https://git.kernel.org/stable/c/7aa095ce7d224308cb6979956f0de8607df93d4f
• https://git.kernel.org/stable/c/cf929c21eeed5bd39873fb14bfdfff963fa6f1da