Access to the UEFI Revocation List files
The files used to update the Secure Boot Forbidden Signature Database, dbx were hosted on this page for years. In 2024, Microsoft created a GitHub repository to contain the dbx files. In addition, they have documentation and more in the repo. The UEFI Forum now suggests the Microsoft repo is the correct place for truth about the files (KEK, db, and dbx) required for Secure Boot. Please visit their GitHub repository at https://github.com/microsoft/secureboot_objects.