/usr/lib/libkscreensaver.so.5 is in libkscreensaver5 4:4.11.8-0ubuntu6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libkscreensaver.so.5.0.0
/usr/lib/libkscreensaver.so.5.0.0