Security updates for Thursday

Security updates have been issued by Fedora (chromium, libldb, rpm, samba, and seamonkey), openSUSE (isync), Oracle (kernel), Red Hat (openssl and squid), SUSE (ceph, flatpak, libostree, xdg-desktop-portal, xdg-desktop-portal-gtk, fwupd, fwupdate, and openexr), and Ubuntu (curl, linux-lts-trusty, and lxml).