In the Linux kernel, the following vulnerability has been resolved:

srcu: Tighten cleanup_srcu_struct() GP checks

This issue requires the attacker to utilize a very specific SRCU racing window and is not exploitable remotely. The proposed fix would require modifying SRCU, a critical and widely used synchronization mechanism in Linux kernel. Given the operational risk of a backport and the limited exploit potential, a fix will not be provided at this time.