Bootrom 7168.

From The Apple Wiki

Earlier revision of the Bootrom for the M2 Pro, M2 Max, and M2 Ultra, which were used in the MacBook Pro (14-inch, 2023), MacBook Pro (16-inch, 2023), Mac Studio (2023), Mac Mini (2023), and the Mac Pro (2023). This ROM was dumped from an early revision of the M2 Max SOC, and was shown publicly by @nyan_satan.

This bootrom has no known vulnerabilities and was compiled before iOS 15.0 beta.