Use-after-free vulnerability in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, and Windows 7 Gold and SP1 allows local users to gain privileges via a crafted application, aka "Win32k Use After Free Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15817
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-075
http://www.us-cert.gov/cas/techalerts/TA12-318A.html
http://www.securitytracker.com/id?1027750