Epic Games Unreal Engine 226f through 436 allows remote attackers to cause a denial of service (CPU consumption or crash) and possibly execute arbitrary code via (1) a packet with a negative size value, which is treated as a large positive number during memory allocation, or (2) a negative size value in a package file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/12012
https://exchange.xforce.ibmcloud.com/vulnerabilities/11305
https://exchange.xforce.ibmcloud.com/vulnerabilities/11302
http://archives.neohapsis.com/archives/bugtraq/2003-05/0142.html
http://archives.neohapsis.com/archives/bugtraq/2003-02/0142.html
http://archives.neohapsis.com/archives/bugtraq/2003-02/0063.html