Microsoft has released SQL Server 2014 RTM CU8, which is Build 12.0.2546. This cumulative update has 38 public hotfixes by my count. This CU may be less attractive now that Microsoft has also released SQL Server 2014 SP1 CU1. I say that because many people may be wanting to get on the SP1 branch, now that the first CU on top of SP1 has been released, and the branches are back in synch.
The official Microsoft build list for SQL Server 2014 is here.