A flaw was found in xorg-x11-server – Oct 2018

A flaw was found in xorg-x11-server. X.Org Server is the free and open-source implementation of the display server for the X Window System. It is very common in computing environment. But IT administrator must stay alert whether your have Linux Desktop install on top of your VM infrastructure. Since a flaw was found in xorg-x11-server before 1.20.3. An incorrect permission check for -modulepath and -logfile options when starting Xorg. X server allows unprivileged users with the ability to log in to the system via physical console to escalate their privileges and run arbitrary code under root privileges.

Reference shown as below: