Do a dist-upgrade we can see that some new packages are going to be installed.
bdmurray@flash:~$ sudo apt-get dist-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done The following NEW packages will be installed: libevent-core-2.0-5 libspeechd2 The following packages will be upgraded: chromium-browser chromium-browser-l10n chromium-codecs-ffmpeg-extra mysql-server-5.7 mysql-server-core-5.7 5 upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/68.3 MB of archives. After this operation, 52.0 MB disk space will be freed. Do you want to continue? [Y/n] n Abort. This is causing the issue because they are in main while the packages to upgrade are in universe. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1624641 Title: Does not install all security updates To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1624641/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs