Windows 7 and Vista crash via SMB exploit
 

[Laurent Gaffié] has discovered an exploit that effects Windows Vista, Windows 7, and possibly Windows Server 2008 (unconfirmed). This method attacks via the NEGOTIATE PROTOCOL REQUEST which is the first SMB query sent. The vulnerability is present only on Windows versions that include Server Message Block 2.0 and have the protocol enabled. A successful attack requires no local access to the machine and results in a Blue Screen of Death.

http://hackaday.com/2009/09/09/windo...a-smb-exploit/