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
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
Package xorg-x11-server-1.14.4-6.fc20: * should fix your issue, * was pushed to the Fedora 20 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing xorg-x11-server-1.14.4-6.fc20' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-2093/xorg-x11-server-1.14.4-6.fc20 then log in and leave karma (feedback).
xorg-x11-server-1.14.4-6.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.