Package: dns-root-data Version: 2017072601~deb8u1 Severity: serious The version of this package that is currently in jessie-updates still only lists the old key 19036 in /usr/share/dns/root.ds. If I understood correctly, starting a week from now the root zone will only be signed with the new key 20326.
/etc/init.d/dnsmasq in jessie relies on the contents of /usr/share/dns/root.ds to set the --trust-anchor argument to the daemon. The corresponding package in stretch-updates looks OK. Could it be that the one in jessie-updates needs to be built with a newer version of bind9utils?