CVE-2025-38522 is a medium severity vulnerability in the Linux kernel scheduler subsystem. It involves improper handling of the update_locked_rq() function when called with a NULL runqueue (rq) pointer. This flaw could lead to a kernel warning and potential instability due to unsafe use of __this_cpu_write() in a preemptible context. The issue has been resolved by ensuring update_locked_rq() is only invoked when rq is non-NULL.