/usr/src/linux-headers-4.15.0-32-generic/virt is in linux-headers-4.15.0-32-generic 4.15.0-32.35~16.04.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/src/linux-headers-4.15.0-32-generic/../linux-headers-4.15.0-32/virt