CVE-2015-1768
win32k.sys in the kernel-mode drivers in Microsoft Windows Server 2003 SP2 and R2 SP2 allows local users to gain privileges or cause a denial of service (memory corruption) via a crafted application, aka "Win32k Memory Corruption Elevation of Privilege Vulnerability."
Date published : 2015-06-09
http://www.securityfocus.com/bid/75024
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-061