QXmlSimpleReader in Qt before 5.2 allows context-dependent attackers to cause a denial of service (memory consumption) via an XML Entity Expansion (XEE) attack.
https://codereview.qt-project.org/#change%2C71368
https://codereview.qt-project.org/#change%2C71010
http://www.ubuntu.com/usn/USN-2057-1
http://secunia.com/advisories/56166
http://secunia.com/advisories/56008
http://lists.qt-project.org/pipermail/announce/2013-December/000036.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00106.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00104.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00085.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00047.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00044.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-May/132395.html