Cannot run command in Docker container
It seems to be a bug introduced in a recent update to the docker RPM packages. A temporary workaround is to downgrade all docker packages to a previous release (75 seems to work).
yum downgrade docker-1.13.1-75.git8633870.el7_5 \ docker-client-1.13.1-75.git8633870.el7_5 \ docker-common-1.13.1-75.git8633870.el7_5 \ docker-rhel-push-plugin-1.13.1-75.git8633870.el7_5