Microsoft Windows XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008 allows remote attackers to cause a denial of service (system hang) via a series of Pragmatic General Multicast (PGM) packets with invalid fragment options, aka the "PGM Malformed Fragment Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5604
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2008/ms08-036
http://www.us-cert.gov/cas/techalerts/TA08-162B.html
http://www.securityfocus.com/bid/29509