From $URL :
Eric Dumazet recently fixed a local DOS in commit 77c1090 "net: fix
infinite loop in __skb_recv_datagram()"? An unprivileged local user
can easily trigger this bug and lock-up the system.
There are no longer any 2.x or <3.8 kernels available in the repository with the exception of sys-kernel/xbox-sources which is unsupported by security.