/usr/share/doc/libkadm5srv-mit8/NEWS.Debian.gz is in libkadm5srv-mit8 1.10+dfsg~beta1-2ubuntu0.7.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libkadm5srv-mit8/../libk5crypto3/NEWS.Debian.gz