Probably not permissions. I comment in issue with a quick reproduction:

docker run -i -t ubuntu:18.04 /bin/bash

apt-get update
apt-get install wget
cd /tmp/
wget <https://pkg.osquery.io/deb/osquery_4.0.1_1.linux.amd64.deb>
dpkg --install osquery_4.0.1_1.linux.amd64.deb
dpkg -L osquery | xargs chown root:root
osqueryd --verbose