Microsoft released their latest flagship database product, Microsoft SQL Server 2016 on June 1st 2016. After 2 months, now Microsoft announced the release of CU #1 which contains fixes for 146 issues across different categories of the product.
The CU1 has 146 hotfixes in 10 different categories as stated above. The highest no.of hotfixes are for the SQL Service.
You can download the CU1 by using the below link.