In the Linux kernel, the following vulnerability has been resolved:
libfs: fix getstasheddentry()
getstasheddentry() tries to optimistically retrieve a stashed dentry from a provided location. It needs to ensure to hold rcu lock before it dereference the stashed location to prevent UAF issues. Use rcudereference() instead of READONCE() it's effectively equivalent with some lockdep bells and whistles and it communicates clearly that this expects rcu protection.