/usr/lib/x86_64-linux-gnu/libaudiocdplugins.so.5 is in kio-audiocd 4:17.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libaudiocdplugins.so.5.0.0
/usr/lib/x86_64-linux-gnu/libaudiocdplugins.so.5.0.0