Multiple buffer overflows in gui/image/qgifhandler.cpp in the QtBase module in Qt before 4.8.7 and 5.x before 5.4.2 allow remote attackers to cause a denial of service (segmentation fault) and possibly execute arbitrary code via a crafted GIF image.
lists.qt-project.org/pipermail/announce/2015-April/000067.html
www.securityfocus.com/bid/74302
www.ubuntu.com/usn/USN-2626-1
codereview.qt-project.org/
lists.fedoraproject.org/pipermail/package-announce/2015-April/155424.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/155927.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/155947.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/155962.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/155976.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/156727.html
lists.fedoraproject.org/pipermail/package-announce/2015-May/156761.html
lists.fedoraproject.org/pipermail/package-announce/2015-May/156937.html
security.gentoo.org/glsa/201603-10