Secunia Security Advisory – Red Hat has issued an update for XFree86. This fixes a vulnerability, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/49159/sa21566.txt
Source: https://packetstormsecurity.com/files/49159/Secunia-Security-Advisory-21566.html