The graphics device interface in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allows remote attackers to bypass the ASLR protection mechanism via unspecified vectors, aka "Windows GDI32.dll ASLR Bypass Vulnerability."
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-005