An issue was discovered in Qt 5.11. A malformed PPM image causes a division by zero and a crash in qppmhandler.cpp.
blog.qt.io/blog/2018/12/04/qt-5-11-3-released-important-security-updates/
lists.opensuse.org/opensuse-security-announce/2019-04/msg00080.html
bugreports.qt.io/browse/QTBUG-69449
lists.debian.org/debian-lts-announce/2020/09/msg00023.html
lists.debian.org/debian-lts-announce/2020/09/msg00024.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C5FHCR4A636BLTAXL76WWDJLOAHGNYG/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FO7IBY7YYKNMRD5OI3JNNUI42WEM7NUV/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XS6G3ZDFCHWFQD4CFXWFPHREOHBBDTD7/
usn.ubuntu.com/4275-1/