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).
How to fix
- linux linux_kernel5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11 or later
- git.kernel.org/stable/c/03474a01c199de17a8e2d39b51df6beb9c76e831
- git.kernel.org/stable/c/1f9885732248d22f788e4992c739a98c88ab8a55
- git.kernel.org/stable/c/7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f
- git.kernel.org/stable/c/7aa095ce7d224308cb6979956f0de8607df93d4f
- git.kernel.org/stable/c/cf929c21eeed5bd39873fb14bfdfff963fa6f1da
- git.kernel.org/stable/c/ef41a85a55022e27cdaebf22a6676910b66f65aa
- git.kernel.org/stable/c/f278b8ebf7eba2a1699cfc7bf30dd3ef898d60d7
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.14.1 ≤ v < 5.15.203, 5.16 ≤ v < 6.1.168, 6.2 ≤ v < 6.6.131, 6.7 ≤ v < 6.12.80, 6.13 ≤ v < 6.18.21, 6.19 ≤ v < 6.19.11, 5.14, 7.0 | 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21, 6.19.11 |
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