A vulnerability has been discovered in the NVIDIA graphic drivers, allowing for a Denial of Service.
Gregory Shikhman discovered that the default Gentoo setup of NVIDIA
drivers creates the /dev/nvidia* with insecure file permissions.
A local attacker could send arbitrary values into the devices, possibly resulting in hardware damage on the graphic board or a Denial of
Service.
http://www.linuxlinks.com/portal/news/article.php?story=20070822135441840