The first post of this thread has been moved to it’s own thread and will be updated regularly: Latest OS versions
That way it will be easier to find the information.
We’ll keep this thread for discussions and information.
iOS 11.2.2 has been released by Apple. It contains a security update, and is recommended for all users. Information has been updated: Latest OS versions
Edit:
There‘s also a Supplemental Update for devices running macOS 10.13.2.