X.Org is an open source implementation of the X Window System. It provides
the basic low-level functionality that full-fledged graphical user
interfaces are designed upon.
An incorrect calculation flaw was discovered in the X.Org Render extension.
A malicious, authorized client could exploit this issue to crash the X.Org
server or, potentially, execute arbitrary code with root privileges.
(CVE-2010-1166)
Users of xorg-x11-server should upgrade to these updated packages, which
contain a backported patch to resolve this issue. All running X.Org server
instances must be restarted for this update to take effect.