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@cyrevolt@mastodon.social
2026-07-09 19:57:34

I can't stop saying the NVRAM vars are a tough #UEFI attack surface, and if processed wrong, may undermine all #security:
kb.cert.org/vuls…

CERT/CC Vulnerability Note VU#806555
A Vulnerability in UEFI Applications allows for secure boot bypass via misused NVRAM variable

@cyrevolt@mastodon.social
2026-07-10 15:17:52

I would like some rough number.
How many devices are affected by #UEFI Secure #Boot issues due to missing cert upgrades?
2%? 20%? 30%?

Microsoft confirms Secure Boot update failing on some Windows 11 PCs, blocks update due to known issues
Microsoft has confirmed that Secure Boot certificate updates are failing or being blocked on some Windows 11 PCs.

@jamesthebard@social.linux.pizza
2026-07-28 18:41:02

So, decided to take a trip down parsing out the GPT tables of attached storage. Still have a ton of work to do, but it's working which is a very welcome surprise.
#uefi #gpt #golang

The output of the Go program that takes in a block device, then parses/processes the GPT header information to show all of the relevant information.
@cyrevolt@mastodon.social
2026-06-03 06:00:36

RE: #UEFI certificates keep machines from b…

@cyrevolt@mastodon.social
2026-06-20 11:44:04

Some more #UEFI entertainment, I'm just waiting for it. 😹
Seriously though, #firmware #security has become such a problem because many vendors just can't even get updates right, still disco…

Windows and Linux users: The deadline to update Secure Boot keys is near
What you need to know about the expiration of keys securing your machine's boot sequence.

@cyrevolt@mastodon.social
2026-07-10 19:44:45

Lenovo #UEFI #firmware bricked itself, messing up the NVRAM during suspend. Black screen only.
We took a fresh image from the website, and the system booted again.
But it showed INVALID for the product name and Linux wouldn't boot. I assume this ended up in DMI.
So we patched bac…