Secunia Security Advisory – Slackware has issued an update for x11. This fixes a vulnerability, which potentially can be exploited by malicious, local users to gain escalated privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/40302/sa16959.txt
Source: https://packetstormsecurity.com/files/40302/Secunia-Security-Advisory-16959.html