Mandriva Linux Security Advisory – A vulnerability in the NVIDIA Xorg driver was discovered by Derek Abdine who found that it did not correctly verify the size of buffers used to render text glyphs, resulting in a crash of the server when displaying very long strings of text. If a user was tricked into viewing a specially crafted series of glyphs, this flaw could be exploited to run arbitrary code with root privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/53596/MDKSA-2007-007.txt
Source: https://packetstormsecurity.com/files/53596/Mandriva-Linux-Security-Advisory-2007.007.html