Secunia Security Advisory – Red Hat has issued an update for xorg-x11. 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/49161/sa21567.txt
Source: https://packetstormsecurity.com/files/49161/Secunia-Security-Advisory-21567.html