Impending Expiration of Microsoft's Key for Linux Secure Boot Raises Concerns
By
pabs3
Pulled from the oven just right. Trustworthy, fact-dense, deeply satisfying.
Summary
Linux users with Secure Boot enabled may face issues as Microsoft's key used for signing the UEFI bootloader is set to expire in September. Replacement key availability and installation on systems pose concerns, requiring potential firmware updates from hardware vendors.
Key quotes
· 4 pulledAfter that point, Microsoft will no longer use that key to sign the shim first-stage UEFI bootloader that is used by Linux distributions to boot the kernel with Secure Boot.
But the replacement key, which has been available since 2023, may not be installed on many systems; worse yet, it may require the hardware vendor to issue an update for the system firmware, which may or may not happen.
It seems that the vast majority of systems will not be able to boot with Secure Boot after the key expires.
Linux users with Secure Boot enabled on their systems knowingly or unknowingly rely on a key from Microsoft that is set to expire in September.
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