libdns in ISC BIND 9.10.0 before P2 does not properly handle EDNS options, which allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) via a crafted packet, as demonstrated by an attack against named, dig, or delv.
http://secunia.com/advisories/58946
http://www.securityfocus.com/bid/68193
http://www.securitytracker.com/id/1030414