[v2.6] Vulnerability in xorg-server allows local information disclosure
David Airlie and Peter Hutterer of Red Hat discovered that
the Xorg X server was vulnerable to an information disclosure flaw
related to input handling and devices hotplug.
When an X server is running but not on front (for example because of a
switch), a newly plugged input device would still be recognized and
handled by the X server, which would actually transmit input events to
its clients on the background.
This could allow an attacker to recover some input events not intended
for the X clients, including sensitive information.
(from redmine: issue id 1793, created on 2013-04-19, closed on 2013-04-24)