/usr/lib/x86_64-linux-gnu/libext2fs.so is in e2fslibs-dev 1.42.9-3ubuntu1.2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /lib/x86_64-linux-gnu/libext2fs.so.2
/lib/x86_64-linux-gnu/libext2fs.so.2