The clip_mkip function in net/atm/clip.c of the ATM subsystem in Linux kernel allows remote attackers to cause a denial of service (panic) via unknown vectors that cause the ATM subsystem to access the memory of socket buffers after they are freed (freed pointer dereference).
https://exchange.xforce.ibmcloud.com/vulnerabilities/29387
http://www.ubuntu.com/usn/usn-395-1
http://support.avaya.com/elmodocs2/security/ASA-2007-078.htm
http://support.avaya.com/elmodocs2/security/ASA-2006-254.htm
http://support.avaya.com/elmodocs2/security/ASA-2006-249.htm