The socket implementation in net/core/sock.c in the Linux kernel before 2.6.35 does not properly manage a backlog of received packets, which allows remote attackers to cause a denial of service by sending a large amount of network traffic, related to the sk_add_backlog function and the sk_rmem_alloc socket field. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4251.
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c377411f2494a931ff7facdbb3a6839b1266bcf6
kerneltrap.org/mailarchive/linux-netdev/2010/3/3/6271093/thread
www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
www.securityfocus.com/bid/46637
bugzilla.redhat.com/show_bug.cgi?id=657303