Technology

59377 readers

4087 users here now

This is a most excellent place for technology news and articles.

Our Rules

Follow the lemmy.world rules.
Only tech related content.
Be excellent to each another!
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, to ask if your bot can be added please contact us.
Check for duplicates before posting, duplicates may be removed

Approved Bots

founded 1 year ago

MODERATORS

542

Encryption-breaking, password-leaking bug in many AMD CPUs could take months to fix (arstechnica.com)

submitted 1 year ago by Lanky_Pomegranate530@lemmy.world to c/technology@lemmy.world

95 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] anlumo@feddit.de 8 points 1 year ago (1 children)

It wasn't branch prediction alone, it was the cache combined with branch prediction. The problem is that even discarded outcomes fill the cache with data. Those older vulnerabilities also had the problem that the access permissions check was done after the branch prediction. It's probably too expensive to do when it's not even clear yet whether the branch is going to be taken (that's just speculation on my part though).

[–] jumperalex@lemmy.world 7 points 1 year ago

(that’s just speculation on my part though).

I see what you did there, even if you didn't :)