Buffer overflow in win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, and Windows 7 SP1 allows local users to cause a denial of service (system hang) via a crafted application that leverages improper handling of objects in memory, aka "Win32k Buffer Overflow Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17188
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-053