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Apples's M1 has an issue too: PACMAN

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madires:
A new vulerability was found in Apples's M1. Possibly other ARM based CPUs are also affected:
- MIT researchers uncover ‘unpatchable’ flaw in Apple M1 chips (https://techcrunch.com/2022/06/10/apple-m1-unpatchable-flaw/)
- New 'PacMan' flaw in Apple Silicon is an echo of Spectre and Meltdown (https://appleinsider.com/articles/22/06/10/new-pacman-flaw-in-apple-silicon-is-an-echo-of-spectre-and-meltdown)
- PACMAN Attacking ARM Pointer Authentication with Speculative Execution (https://pacmanattack.com/)

ataradov:
I'm not sure it actually matters, especially on a single user computers.

Meltdown and Spectre made a lot of noise, and are generally neat exploits, yet there is no evidence of them actually being used in a wild. And shared server applications where it could potentially matter hardened against them with various software measures.

I personally would pick performance over this type of security for the hardware I use.

madires:
Yep, most users aren't really affected by this security issue. But it's good to know about this new attack.

SiliconWizard:
True.

Now, most of the security issues found on modern processors are due to speculative execution one way or another.
While it's hard to just do without it (that would harm their achievable performance significantly), it seems even harder to get it fully secure.
I'm not even sure if it is at all possible.

james_s:
I tend not to worry about this sort of thing. By far the most vulnerable attack vector in personal computers is the user. It absolutely dwarfs all of the various exploits.

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