/usr/lib/x86_64-linux-gnu/libipset.so is in libipset-dev 6.11-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libipset.so.2.0.0
/usr/lib/x86_64-linux-gnu/libipset.so.2.0.0