Microsoft has released final service pack for SQL Server 2012 on 3rd October 2017. It is Microsoft SQL Server 2012 Service Pack 4 (SP4). After installation the service pack, the SQL Server service version should be 11.0.7001.0.
Microsoft SQL Server 2012 service packs are cumulative updates and upgrade all editions and service levels of SQL Server 2012 to SP4. This service pack contains up to and including SQL Server 2012 Service Pack 3 Cumulative Update 9 (CU9).
Where to obtain Microsoft SQL Server 2012 Service Pack 4 (SP4)