Security updates for Wednesday

Security updates have been issued by Arch Linux (dbus, firefox, kernel, linux-lts, linux-zen, and python), CentOS (bind and kernel), Debian (firefox-esr, glib2.0, and vim), Fedora (dbus, kernel, kernel-headers, mingw-libxslt, poppler, and python-gnupg), openSUSE (gnome-shell, kernel, libcroco, php7, postgresql10, python, sssd, and thunderbird), Oracle (kernel and libvirt), Red Hat (go-toolset:rhel8, gvfs, java-11-openjdk, pki-deps:10.6, systemd, and WALinuxAgent), SUSE (docker, kernel, libvirt, openssl, openssl1, and python-Jinja2), and Ubuntu (samba).