The mstflint userspace tools require a kernel module to operate in Secure Boot mode. This package provides the required module source, and will build that module for your kernel upon installation.

Note: This module will need to be signed by a trusted key in order for your kernel to load it when booted in Secure Boot mode. For information on how to do this, see the appropriate documentation for your distribution. For Debian and Ubuntu:

https://wiki.debian.org/SecureBoot https://wiki.ubuntu.com/UEFI/SecureBoot