The BMP decoder in QtGui in QT before 5.5 does not properly calculate the masks used to extract the color components, which allows remote attackers to cause a denial of service (divide-by-zero and crash) via a crafted BMP file.
http://www.ubuntu.com/usn/USN-2626-1
http://www.securityfocus.com/bid/73029
http://lists.qt-project.org/pipermail/announce/2015-February/000059.html
http://lists.opensuse.org/opensuse-updates/2015-03/msg00068.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151352.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151138.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151121.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151034.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/150940.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/150800.html