The udp6_ufo_fragment function in net/ipv6/udp.c in the Linux kernel before 2.6.39, when a certain UDP Fragmentation Offload (UFO) configuration is enabled, allows remote attackers to cause a denial of service (system crash) by sending fragmented IPv6 UDP packets to a bridge device.
http://downloads.avaya.com/css/P8/documents/100156038
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
http://www.openwall.com/lists/oss-security/2011/11/21/10
http://www.securityfocus.com/bid/50751
https://bugzilla.redhat.com/show_bug.cgi?id=682066
https://bugzilla.redhat.com/show_bug.cgi?id=755584
https://github.com/torvalds/linux/commit/a9cf73ea7ff78f52662c8658d93c226effbbedde