At security level, SELinux has been updated for faster policy creation and improved overall ease of use. This new release includes a consistent compliance checking mechanism across containerized and traditional non-container workloads for better overall operations efficiency. Red Hat’s Identity Management solution has also been improved, providing better performance for large installations, support for smart card authentication with Active Directory, and support for configurable authentication strength across individual hosts and services.
Among other improvements, Red Hat Enterprise Linux 7.3 adds new features for disaster recovery, Linux containers and Internet of Things. For further information, read the official press release