Galaxy S6 Edge is currently receiving patch update for August 2016 which people in India has been receiving push notification for the update and changed the firmware version to G925IDVS3EPH2.
The update also brings a patch for security loopholes which will prevent the phone from being infected by malwares. As we have seen the latest malware called QuadRooter but there's no details whether the patch update will prevent the phone from the malware.
The patch update also packs some improvements and other optimizations and enhancements. But there isn't any information yet whether Galaxy S6 is also getting such patch update.