/lib/x86_64-linux-gnu/libseccomp.so.2 is in libseccomp2 2.3.1-2.1+deb9u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libseccomp.so.2.3.1
/lib/x86_64-linux-gnu/libseccomp.so.2.3.1