The Graphics Rendering Engine in Microsoft Windows 2000 SP4 and XP SP2 allows local users to gain privileges via "invalid application window sizes" in layered application windows, aka the "GDI Invalid Window Size Elevation of Privilege Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1385
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-017
http://www.vupen.com/english/advisories/2007/1215
http://www.securitytracker.com/id?1017846
http://www.securityfocus.com/bid/23277
http://www.securityfocus.com/archive/1/466186/100/200/threaded