The atalk_sum_skb function in AppleTalk for Linux kernel 2.6.x before 2.6.21, and possibly 2.4.x, allows remote attackers to cause a denial of service (crash) via an AppleTalk frame that is shorter than the specified length, which triggers a BUG_ON call when an attempt is made to perform a checksum.
https://issues.rpath.com/browse/RPL-1244
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=235857
http://www.vupen.com/english/advisories/2007/1340
http://www.ubuntu.com/usn/usn-464-1
http://www.securityfocus.com/bid/23376
http://www.securityfocus.com/archive/1/471457
http://www.novell.com/linux/security/advisories/2007_43_kernel.html
http://www.novell.com/linux/security/advisories/2007_35_kernel.html
http://www.novell.com/linux/security/advisories/2007_30_kernel.html
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.5
http://www.debian.org/security/2007/dsa-1304
http://www.debian.org/security/2007/dsa-1286
http://secunia.com/advisories/25961
http://secunia.com/advisories/25714
http://secunia.com/advisories/25691
http://secunia.com/advisories/25683
http://secunia.com/advisories/25392
http://secunia.com/advisories/25226
http://secunia.com/advisories/25099
http://secunia.com/advisories/25078
http://secunia.com/advisories/24901
http://secunia.com/advisories/24793
http://lists.suse.com/archive/suse-security-announce/2007-May/0001.html