win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, Windows 7 Gold and SP1, and Windows 8 allows local users to cause a denial of service (reboot) via a crafted OpenType font, aka "OpenType Font Parsing Vulnerability" or "Win32k Font Parsing Vulnerability."
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.