Some Linux users might be interested, reading about this (Subscriber link, that bypasses the Paywall, since I find this information important to spread for awareness):
https://lwn.net/SubscriberLink/1029767/0a550f0972703141/
„Linux users who have Secure Boot enabled on their systems knowingly or unknowingly rely on a key from Microsoft that is set to expire in September. After 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.“