Security updates for Wednesday

Security updates have been issued by Debian (eterm, mrxvt, and rxvt), Mageia (cgal, curl, exiv2, polkit, squid, thunderbird, and upx), openSUSE (firefox and libX11), Oracle (libwebp, nginx:1.18, and thunderbird), Red Hat (.NET 5.0, .NET Core 3.1, 389-ds-base, dhcp, gupnp, hivex, kernel, kernel-rt, libldb, libwebp, microcode_ctl, nettle, postgresql:10, postgresql:9.6, qemu-kvm, qt5-qtimageformats, rh-dotnet50-dotnet, and samba), SUSE (apache2-mod_auth_openidc, firefox, gstreamer-plugins-bad, kernel, libX11, pam_radius, qemu, runc, spice, and spice-gtk), and Ubuntu (intel-microcode and rpcbind).