221
Microsoft’s Secure Boot has been broken for a decade and no one noticed until now
(www.welivesecurity.com)
this post was submitted on 15 Jul 2026
221 points (98.3% liked)
Technology
86364 readers
3047 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related news or articles.
- Be excellent to each other!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, this includes using AI responses and summaries. To ask if your bot can be added please contact a mod.
- Check for duplicates before posting, duplicates may be removed
- Accounts 7 days and younger will have their posts automatically removed.
Approved Bots
founded 3 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
I'm assuming this is why it will forever "warn" me that my phone is running an "insecure" OS?
That's moreso because it's using an unofficial key, so the device manufacturer (Google in the case of Pixels) cannot verify the authenticity of the OS you're running.
If you were able to replace that bootloader with a custom one, then you would be able to disable that message or just use a completely different bootloader like UBoot or EDK2 if it was ported, though.
Functionally, though, wouldn't it be the same as replacing the computer's SecureBoot bootloader, since it's Microsoft (in the case of SecureBoot) that doesn't like the unofficial key that Linux installs? Shouldn't the user be allowed to add or remove any key they desire from the allow list of official keys (maybe have some sort of decentralized verification system, if they user decides they want to verify it)?
I'm more thinking out loud here, trying to understand.
The difference is that with ARM TrustZone, there is an efuse burned with the key that the manufacturer set in the SoC itself that checks the signature of the primary bootloader, which cannot be modified.
Standard computers do not have such a hardware-level key, so if you wanted to replace the bootloader with something like coreboot if it has been ported to your board, then you can. On smartphones, you do not have that option.
Same thing goes for even more locked down systems like game consoles.