The NVIDIA Binary Graphics Driver for Linux is vulnerable to a buffer overflow that allows an attacker to run arbitrary code as root. This bug can be exploited both locally or remotely (via a remote X client or an X client which visits a malicious web page). A working proof-of-concept root exploit is included with this advisory. The NVIDIA drivers for Solaris and FreeBSD are also likely to be vulnerable.
Disabling Render acceleration in the "nvidia" driver, via the "RenderAccel" X configuration option, can be used as a workaround for this issue.