All the vulnerabilities. Speculative execution vulnerabilities were found in AMD, just not the meltdown vulnerability.
And, his point still stands. While intel has/had meltdown, which was pretty bad. That doesn't mean that a Meltdown like bug doesn't exist in AMD's hardware.
It's like finding a bug in the OpenJDK that isn't in Zulu and then declaring that "Zulu is more secure than the OpenJDK!"
Or an even closer example "Intel doesn't have the TLB bug[0]! Intel makes better CPUs!"
AMD isn't guaranteed free of all exploits. It is only guaranteed to not suffer specifically from meltdown.
> All the vulnerabilities. Speculative execution vulnerabilities were found in AMD, just not the meltdown vulnerability.
Just Not Meltdown. Or SPOILER. Or Fallout. Or RIDL. Or ZombieLoad.
You're really underselling the difference between the two. AMD's processors have only shown vulnerability to the issues that are inherent to the nature of speculative execution (Spectre).
Intel, on the other hand, has suffered from no less than 5 or 6 separate disclosures of vulnerabilities from various places in their microarchitecture where they cut corners on process separation in order to gain speed. None of these exploits have been pulled off against AMD, despite many of the papers authors explicitly trying to,
And, his point still stands. While intel has/had meltdown, which was pretty bad. That doesn't mean that a Meltdown like bug doesn't exist in AMD's hardware.
It's like finding a bug in the OpenJDK that isn't in Zulu and then declaring that "Zulu is more secure than the OpenJDK!"
Or an even closer example "Intel doesn't have the TLB bug[0]! Intel makes better CPUs!"
AMD isn't guaranteed free of all exploits. It is only guaranteed to not suffer specifically from meltdown.
[0] https://www.anandtech.com/show/2477/2