While the Galaxy S6 hasn’t even been released yet, the guys over at Chainfire have already managed to root the device. Chainfire has a history of gaining root access of Android devices even before they hit the market and the Galaxy s6 seems to be among them.
As Chainfire describes in a Google Plus post: “first CF-Auto-Root’s for the S6 family are up: SM-G920T and SM-G925T – the T-Mobile US S6 and S6 Edge”. As of now, Chainfire Auto Root is only available for the SM-G920T and SM-G925T (Both T-Mobile variants of the Galaxy S6)
Important: Keep in mind that this will disable KNOX and with it, several enterprise features and Samsung’s new Payment system, Samsung Pay.