SUSE CVE-2023-53419

In the Linux kernel, the following vulnerability has been resolved: rcu: Protect rcuprinttaskexpstall -exptasks access For kernels built with CONFIGPREEMPTRCU=y, the following scenario can result in a NULL-pointer dereference: CPU1 CPU2 rcupreemptdeferredqsirqrestore rcuprinttaskexpstall if...

CVE-2023-53419

CVE-2023-53419 : Linux kernel fix for a NULL-pointer dereference in PREEMPT_RT RCU code. The vulnerability arises when CPU2 reads rnp->exp_tasks without holding rnp->lock while CPU1 may update rnp->exp_tasks to NULL, leading to a dereference of a NULL pointer. The documented fix is to ho...