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.
iDefense reported three integer overflow flaws in the X.org Render and DBE extensions. A malicious authorized client could exploit this issue to cause a denial of service (crash) or potentially execute arbitrary code with root privileges on the X.org server. (CVE-2006-6101, CVE-2006-6102, CVE-2006-6103)
Users of X.org should upgrade to these updated packages, which contain a backported patch and is not vulnerable to this issue.