Secure boot certificate rollover is real but probably won't hurt you

33 zdw 5 7/31/2025, 5:21:07 PM mjg59.dreamwidth.org ↗

Comments (5)

M95D · 55m ago
> [...] systems that only trust the new certificate and not the old one would refuse to boot older Linux, wouldn't support old graphics cards, and also wouldn't boot old versions of Windows. Nobody wants that [...]

EVERYBODY wants that! And I mean ABSOLUTELY EVERYBODY! Updates are now mandatory everywhere, in both Windows and Linux, and GPU manufactureres would LOVE to make the old cards obsolete, even if technically the new cards aren't much better.

So expect to see the old certificate invalidated quickly and automatically, in the name of security, of course!

michaelt · 14m ago
Even if this did happen, there's a trivial workaround available: Just go into your BIOS and switch 'Secure Boot' off.

Secure Boot is a fine thing if you're a huge corporation and want to harden laptops against untrustworthy employees, or you've got such a huge fleet of servers they go missing despite your physical security controls, or you're making a TiVo style product you want to harden against the device owners. But when the user is the device owner? Doesn't do much.

trelane · 5m ago
> you're making a TiVo style product you want to harden against the device owners.

This sentence just makes me so sad

Arnavion · 14m ago
There is also the option of enrolling your own certs and resigning the bootloader and any Option ROMs you need, if you're really worried / expect to actually be broken by this.
dang · 39m ago
Recent and related:

Linux and Secure Boot certificate expiration - https://news.ycombinator.com/item?id=44601045 - July 2025 (265 comments)