An issue was discovered in Qt before 5.11.3. There is QTgaFile Uncontrolled Resource Consumption.
lists.opensuse.org/opensuse-security-announce/2019-04/msg00002.html
access.redhat.com/errata/RHSA-2019:2135
blog.qt.io/blog/2018/12/04/qt-5-11-3-released-important-security-updates/
codereview.qt-project.org/#/c/237761/
lists.debian.org/debian-lts-announce/2019/05/msg00014.html
lists.debian.org/debian-lts-announce/2020/09/msg00023.html