X.Org is an open source implementation of the X Window System. It providesthe basic low-level functionality that full-fledged graphical userinterfaces are designed upon.Multiple input sanitization flaws were found in the X.Org GLX (OpenGLextension to the X Window System) extension. A malicious, authorized clientcould use these flaws to crash the X.Org server or, potentially, executearbitrary code with root privileges. (CVE-2010-4818)An input sanitization flaw was found in the X.Org Render extension. Amalicious, authorized client could use this flaw to leak arbitrary memoryfrom the X.Org server process, or possibly crash the X.Org server.(CVE-2010-4819)Users of xorg-x11 should upgrade to these updated packages, which contain abackported patch to resolve these issues. All running X.Org serverinstances must be restarted for this update to take effect.