Israeli researcher finds vunerability in Window Kernel. "Win32k.sys" kernel-mode device driver, the kernel component of the Windows subsystem. Attackers could exploit the flaw using "GetClipboardData," an API (aplication programming interface) that retrieves data from the Window clipboard. A successful exploit could allow hackers to execute their attack code in kernel mode, which would then let them infect the PC with malware or pillage any data on the machine.
http://www.networkworld.com/news/2010/080710-microsoft-probes-new-windows-kernel.html?hpg1=bn