CVE-2025-38621

The CVE-2025-38621 issue affects the Linux kernel md subsystem, where md_spares_need_change could call rdev_addable() while under RCU, potentially dereferencing an rdev.mddev that is NULL after release, causing a NULL pointer dereference and a panic. The published description notes the fix is to ...

CVE-2025-38621 md: make rdev_addable usable for rcu mode

In the Linux kernel, the following vulnerability has been resolved: md: make rdevaddable usable for rcu mode Our testcase trigger panic: BUG: kernel NULL pointer dereference, address: 00000000000000e0 ... Oops: Oops: 0000 1 SMP NOPTI CPU: 2 UID: 0 PID: 85 Comm: kworker/2:1 Not tainted 6.16.0+ 94...