Hey there Jurutka, Vojtech
Thanks for using QandA platform
As far as i know Microsoft had announced Extended Security Updates (ESU) for SQL Server 2012, extending support beyond the end of the Extended Support phase, which ended on July 12, 2022. These updates provide critical and important security updates for a maximum of three years after the end of Extended Support, which would align with your mentioned timeframe of June 2025.
Plz go through the documentation below for detailed info on this.
https://video2.skills-academy.com/en-us/lifecycle/products/microsoft-sql-server-2012
If this helps kindly accept the answer thanks much.