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."
Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.