/usr/lib/x86_64-linux-gnu/libyelp.so is in libyelp-dev 3.18.1-1ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libyelp.so.0.0.0
/usr/lib/x86_64-linux-gnu/libyelp.so.0.0.0