Security updates for Tuesday

Security updates have been issued by CentOS (libksba, thunderbird, and tigervnc and xorg-x11-server), Debian (clamav, nss, python-django, and sox), Fedora (kernel and thunderbird), Mageia (curl, firefox, nodejs-qs, qtbase5, thunderbird, upx, and webkit2), Red Hat (httpd:2.4, kernel, kernel-rt, kpatch-patch, pcs, php:8.0, python-setuptools, Red Hat build of Cryostat, Red Hat Virtualization Host 4.4.z SP 1, samba, systemd, tar, and thunderbird), Scientific Linux (firefox and thunderbird), and SUSE (clamav, firefox, jhead, mozilla-nss, prometheus-ha_cluster_exporter, tar, and ucode-intel).