Posted at LWN.net: "Chris Evans, Joseph S. Myers, Michal Zalewski, Alan Cox, and others have
noted a number of problems in several components of the X Window System
sample implementation (from which XFree86 is derived). While there are no
known reports of real-world malicious exploits of any of these problems, it
is nevertheless suggested that you upgrade your XFree86 packages
The scope of this advisory is XFree86 3.3.6 only, since that is the version
released with Debian GNU/Linux 2.2 ("potato"); Debian packages of XFree86
4.0 and later have not been released as part of a Debian distribution."