In the Linux kernel, the following vulnerability has been resolved:
bpf, sockmap: Don't let sockmap{close,destroy,unhash} call itself
sock_map proto callbacks should never call themselves by design. Protect against bugs like [1] and break out of the recursive loop to avoid a stack overflow in favor of a resource leak.
[1] https://lore.kernel.org/all/00000000000073b14905ef2e7401@google.com/