This is an exploit chain for Fire HD 8 (2018) (8th gen / karnak / KFKAWI). It contains a MediaTek bootrom exploit and a LittleKernel bootloader exploit.
For installation instructions, see https://forum.xda-developers.com/hd8-hd10/orig-development/fire-hd-8-2018-downgrade-unlock-root-t3894256
brom-payload includes code from Linux kernel, and is therefore licensed under GPLv2.
lk-payload, modules and microloader are licensed under MIT.
See LICENSE.MIT and LICENSE.GPL2 for more details.