The below table reflects the builds released for SQL Server 2017 as well as key comments that relate to the build where appropriate.
The current recommended Build is 14.0.3006.16 (CU1).
|CU1||14.0.3006.16||CU||2017 Oct||Contains 60+ fixes.|
Allow SQL Server 2017 Express edition to act as a witness role in a database mirroring session.
Allow use of new Dynamic Management Views (DMV) and Dynamic Management Functions (DMF).
|14.0.1000.169||RTM||2017 Oct||Evaluation Edition download|