The TCP/IP implementation in Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 allows remote attackers to cause a denial of service (system hang) via crafted packets with malformed TCP selective acknowledgement (SACK) values, aka "TCP/IP Selective Acknowledgement Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8449
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-009