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Linux and Secure Boot certificate expiration
51 pabs3 16 7/18/2025, 3:53:31 AM lwn.net ↗
https://support.microsoft.com/en-us/topic/windows-secure-boo...
https://techcommunity.microsoft.com/blog/windows-itpro-blog/...
Really it seems like having any expiry date for these certificates is a mistake. The one thing it might protect against is a compromised signing key, but if you have to wait 15 years for a compromised key to stop being valid, it's not very useful!
Don't worry, the replacement MS certs expire in 2038 (a couple of months after the 32-bit unix time rollover).
Microsoft showed they can semi-competently run a PKI. The end.
Now had the Linux folks stepped up to the plate early on, instead of childishly acting like Secure Boot was the computing antichrist, the story might be different. But they didn't. We only have shim because some people at Red Hat had the common sense to play ball.
AFAICT you can still disable Secure Boot in most UEFI firmware, and boot anything you like (or not like, if an attacker tampers with your system).
I've had to disable it on all my installations because of either nvidia drivers or virtual box modules. In general Arch based distros didn't seem too friendly for secure boot set up.
The laptops I have gotten from eg Dell with Linux pre installed have just worked. Machines I have upgraded through many versions of Ubuntu (lts versions of 16-24) were weirdly broken for a while when I first turned secure boot on while I figured it out, but that seemed reasonable for such a pathological case. Machines I have installed Debian on in the last few years have been fine, except for some problems when I was booting from a software raid array, but that is because I was using 2 identical drives and I kept getting them confused in the UEFI boot configuration.
I have not used them on machines with nvidia, vbox, or other out-of kernel-tree modules though.
Still on Windows only for kids games. Linux user since last millennium.
Fine for systems you physically manage, anything remote in a datacenter I wouldn't bother (without external motivation)