The igmp_heard_query function in net/ipv4/igmp.c in the Linux kernel before 3.2.1 allows remote attackers to cause a denial of service (divide-by-zero error and panic) via IGMP packets.
https://github.com/torvalds/linux/commit/a8c1f65c79cbbb2f7da782d4c9d15639a9b94b27
https://github.com/torvalds/linux/commit/25c413ad0029ea86008234be28aee33456e53e5b
https://bugzilla.redhat.com/show_bug.cgi?id=772867
http://www.openwall.com/lists/oss-security/2012/01/10/5