/usr/lib/libkcompactdisc.so.4 is in libkcompactdisc4 4:4.12.3-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libkcompactdisc.so.4.12.4
/usr/lib/libkcompactdisc.so.4.12.4