XFree86 is an implementation of the X Window System, which provides the core functionality for the Linux graphical desktop.
iDefense reported three integer overflow flaws in the XFree86 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 XFree86 server. (CVE-2006-6101, CVE-2006-6102, CVE-2006-6103)
Users of XFree86 should upgrade to these updated packages, which contain a backported patch and is not vulnerable to this issue.