QXmlStream in Qt 5.x before 5.11.3 has a double-free or corruption during parsing of a specially crafted illegal XML document.Referenceshttps://www.debian.org/security/2019/dsa-4374https://codereview.qt-project.org/#/c/236691/http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00066.htmlhttps://lists.debian.org/debian-lts-announce/2019/01/msg00004.htmlhttps://blog.qt.io/blog/2018/12/04/qt-5-11-3-released-important-security-updates/https://blog.qt.io/blog/2018/12/04/qt-5-11-3-released-important-security-updates/https://codereview.qt-project.org/#/c/236691/https://lists.debian.org/debian-lts-announce/2019/05/msg00014.htmlhttps://usn.ubuntu.com/4003-1/https://access.redhat.com/errata/RHSA-2019:2135https://access.redhat.com/errata/RHSA-2019:3390http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00057.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-09/msg00071.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-09/msg00073.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-09/msg00090.htmlhttps://lists.debian.org/debian-lts-announce/2020/09/msg00023.html
