Mandriva Linux Security Advisory – Local exploitation of a memory corruption vulnerability in the X.Org and XFree86 X server could allow an attacker to execute arbitrary code with privileges of the X server, typically root. iDefense reported two integer overflows in the way X.org handled various font files. A malicious local user could exploit these issues to potentially execute arbitrary code with the privileges of the X.org server.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/55839/MDKSA-2007-080-1.txt
Source: https://packetstormsecurity.com/files/55839/Mandriva-Linux-Security-Advisory-2007.080.html