Unreal engine 3, as used in Unreal Tournament 3 1.3, Frontlines: Fuel of War 1.1.1, and other products, allows remote attackers to cause a denial of service (server exit) via a packet with a large length value that triggers a memory allocation failure.
https://exchange.xforce.ibmcloud.com/vulnerabilities/45095
http://www.securityfocus.com/archive/1/496280/100/0/threaded
http://archives.neohapsis.com/archives/fulldisclosure/2008-09/0189.html