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+++ This bug was initially created as a clone of Bug #1061466 +++

Description of problem:
XSetDeviceButtonMapping takes a user-specified map of button mappings (with a user-specified length). The server checks if each button is down before applying a mapping but it erroneously treats each button number as an array index instead of a bitflag, causing out-of-bounds access on the fixed-size array.

Version-Release number of selected component (if applicable):
xorg-x11-server-Xorg-1.14.4-5.fc20.x86_64

--- Additional comment from Fedora Update System on 2014-02-04 18:29:02 EST ---

xorg-x11-server-1.14.4-6.fc20 has been submitted as an update for Fedora 20.
https://admin.fedoraproject.org/updates/xorg-x11-server-1.14.4-6.fc20

xorg-x11-server-1.15.0-20.el6 is available in brew

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2014-1376.html