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Security updates have been issued by Arch Linux (ant, cimg, containerd, libproxy, libproxy-mozjs, libproxy-webkit, libslirp, python-lxml, tomcat8, tomcat9, and xorg-server), CentOS (firefox and thunderbird), Debian (apt, linux-4.19, python-apt, and sqlite3), Fedora (ceph, chromium, containerd, matrix-synapse, mingw-openjpeg2, openjpeg2, python-authlib, python-canonicaljson, and spice-gtk), Mageia (chromium-browser-stable), openSUSE (chromium and pngcheck), Slackware (curl), SUSE (clamav, curl, openssh, openssl-1_0_0, openssl-1_1, openssl1, python-pip, python-scripttest, python-urllib3, and xen), and Ubuntu (apt, curl, and python-apt).