/usr/lib/x86_64-linux-gnu/libnl-xfrm-3.so is in libnl-xfrm-3-dev 3.2.29-0ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libnl-xfrm-3.so.200.24.0
/usr/lib/x86_64-linux-gnu/libnl-xfrm-3.so.200.24.0