Security-Enhanced Linux (SELinux) is a brave attempt to clean up the security holes in Linux containers and is an implementation of a Mandatory Access Control (MAC) mechanism, Multi-Level security (MLS), and Multi-Category security (MCS) in the Linux kernel. A new collaborative initiative referred to as Virtproject, is being built on SELinux, and this is getting integrated with Libvirt to provide an adaptable MAC framework for virtual machines, as well as containers. This new architecture provides a sheltered separation and safety net for containers, as it primarily prevents root processes within the container from interfacing and interfering with other processes running outside this container. Docker containers are automatically assigned to an SELinux context specified in the SELinux policy.

SELinux always checks for all the allowed operations after the standard discretionary access control (DAC) is completely checked. SELinux can establish...