The problem can be corrected by updating your system to the following package versions: Ubuntu 19.10: libqt5core5a 5.12.4+dfsg-4ubuntu1.1 libqt5gui5 5.12.4+dfsg-4ubuntu1.1 Ubuntu 18.04 LTS: libqt5core5a 5.9.5+dfsg-0ubuntu2.5 libqt5gui5 5.9.5+dfsg-0ubuntu2.5 Ubuntu 16.04 LTS: libqt5core5a 5.5.1+dfsg-16ubuntu7.7 libqt5gui5 5.5.1+dfsg-16ubuntu7.7 After a standard system update you need to restart your session to make all the necessary changes.
CVE-2018-19872, CVE-2019-18281, CVE-2020-0569, CVE-2020-0570
https://launchpad.net/ubuntu/+source/qtbase-opensource-src/5.12.4+dfsg-4ubuntu1.1 https://launchpad.net/ubuntu/+source/qtbase-opensource-src/5.9.5+dfsg-0ubuntu2.5 https://launchpad.net/ubuntu/+source/qtbase-opensource-src/5.5.1+dfsg-16ubuntu7.7
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