The Microsoft UEFI CA 2011 has officially expired, marking a significant milestone in the industry-wide transition to updated secure boot certificates. Debian and other Linux distributions successfully coordinated with Microsoft to deploy dual-signed shim binaries, ensuring continued compatibility and secure boot functionality without widespread disruption.
Background
Secure Boot relies on a chain of trust rooted in firmware-level certificates; the expiration of older Microsoft UEFI certificates requires vendors to update their shim loaders to maintain boot capability on modern hardware.
- Source
- Lobsters
- Published
- Jun 28, 2026 at 06:42 AM
- Score
- 8.0 / 10