Linux SCTP (lksctp) before 2.6.17 allows remote attackers to cause a denial of service (deadlock) via a large number of small messages to a receiver application that cannot process the messages quickly enough, which leads to "spillover of the receive buffer."
https://exchange.xforce.ibmcloud.com/vulnerabilities/26433
http://www.ubuntu.com/usn/usn-302-1
http://support.avaya.com/elmodocs2/security/ASA-2006-200.htm