Simon's SQL

Finally, MS release new service pack update for SQL 2012 and SQL 2014.

Please follow the below link for guidance for SQL server.

All official links keep updating in the same article.

SQL Server – https://support.microsoft.com/en-us/help/4073225/guidance-for-sql-server
Windows Server – https://support.microsoft.com/en-us/help/4072698/windows-server-guidance-to-protect-against-the-speculative-execution

Here is the recent update for SQL 2012 and SQL 2014.

4057117 Description of the security update for SQL Server 2014 SP2 CU: January 16, 2018
4057120 Description of the security update for SQL Server 2014 SP2 GDR: January 16, 2018
4057116 Description of the security update for SQL Server 2012 SP4 GDR: January 12, 2018 

Here are all supported versions’ link.

SQL Server 2017 GDR
SQL Server 2016 SP1 CU7*
SQL Server 2016 SP1 GDR
SQL Server 2016 RTM CU
SQL Server 2016 RTM GDR 
SQL Server 2008 SP4
SQL Server 2008 R2 SP3
SQL Server 2012 SP4 GDR
SQL Server 2012 SP3 CU
SQL Server 2012 SP3 GDR
SQL Server 2014 SP2 CU*
SQL Server 2014 SP2 GDR