On October 19, 2015, Microsoft released SQL Server 2014 Service Pack 1 Cumulative Update 3 (Build 12.0.4425.19). This CU has 36 updates in the public fix list. If you are on the Service Pack 1 branch of SQL Server 2014 (which is where you should be by now, in my opinion), then you should be planning how you will test and deploy this cumulative update on your database servers in a timely fashion.
If you are still on the RTM branch of SQL Server 2014, Microsoft has also released SQL Server 2014 RTM Cumulative Update 10 (Build 12.0.2556.4), which has 30 updates in the public fix list.
The official Microsoft SQL Server 2014 Build versions list is here, while the SQLSentry SQL Server 2014 Build List is here.
I also have a link page, that points to updated posts about the more interesting hotfixes in cumulative updates for the various active SQL Server versions and branches called SQL Server Cumulative Update Highlights.
Finally, for the CU-skeptics out there, I have noticed this verbiage from Microsoft is now included with the Knowledge Base article’s for individual hotfixes:
Recommendation: Install the latest cumulative update for SQL Server
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. We recommend that you download and install the latest cumulative updates for SQL Server: