In the Linux kernel, the following vulnerability has been resolved: phonet/pep: fix racy skb_queue_empty() use The receive queues are protected by their respective spin-lock, not the socket lock. This could lead to skb_peek() unexpectedly returning NULL or a pointer to an already dequeued socket buffer.
https://git.kernel.org/stable/c/9d5523e065b568e79dfaa2ea1085a5bcf74baf78
https://git.kernel.org/stable/c/8ef4fcc7014b9f93619851d6b78d6cc2789a4c88
https://git.kernel.org/stable/c/7d2a894d7f487dcb894df023e9d3014cf5b93fe5
https://git.kernel.org/stable/c/0a9f558c72c47472c38c05fcb72c70abb9104277