Uefi 2.7 Pi 1.6

UEFI 2.7 PI 1.6, UEFI 2.7 features, PI 1.6 specification, Secure Boot rollback protection, HTTPS Boot, UEFI capsule update, multi-processor initialization, SMM communication protocol.

The UEFI 2.7 and PI 1.6 specifications have far-reaching implications for various industries and applications: uefi 2.7 pi 1.6

Are you checking this because you are trying to enable for a Windows 11 upgrade, or are you troubleshooting a hardware boot issue? UEFI 2

. Together, they define the two critical halves of the boot process: the Platform Initialization (PI) for low-level silicon setup and the Unified Extensible Firmware Interface (UEFI) Together, they define the two critical halves of

Historically, Secure Boot variables ( PK , KEK , db , dbx ) were stored without explicit timestamps. This made rollback attacks possible—an attacker could force the system to load an old, vulnerable Secure Boot database. Each variable update includes a monotonic timestamp. The firmware rejects any update with a timestamp older than the current one. This kills replay attacks dead.

You are probably already using UEFI 2.7 / PI 1.6. Here is where they are mandatory: