Security updates for Tuesday

Security updates have been issued by Debian (file and thunderbird), Fedora (exercism, libtommath, moby-engine, and python-pyramid), Oracle (cups and kernel), Red Hat (firefox, kernel, kernel-rt, kpatch-patch, and thunderbird), SUSE (amazon-ecs-init, buildah, busybox, djvulibre, exempi, firefox, gsl, keylime, kubernetes1.18, php7, and sccache), and Ubuntu (docker-registry and linux-azure-5.4).