USN-2436-1 fixed vulnerabilities in the X.Org X server. Since publication,additional fixes have been made available for these issues. This updateadds the additional fixes.
Original advisory details:
Ilja van Sprundel discovered a multitude of security issues in the X.Org X server. An attacker able to connect to an X server, either locally or remotely, could use these issues to cause the X server to crash or execute arbitrary code resulting in possible privilege escalation.
The problem can be corrected by updating your system to the following
To update your system, please follow these instructions:
After a standard system update you need to reboot your computer to makeall the necessary changes.