afd.sys in the Ancillary Function Driver in Microsoft Windows XP SP2, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 on 64-bit platforms does not properly validate user-mode input passed to kernel mode, which allows local users to gain privileges via a crafted application, aka "AfdPoll Elevation of Privilege Vulnerability."