As you may know, in recent years, Intel has had to deal with various types of vulnerabilities. Of course, at the end of the day, they ended up affecting the performance of several processor ranges from the microprocessor giant.
Interestingly, it was something that affected Intel more than AMD! Since the blue giant has been taking advantage of its architecture since almost 2015. This while its rival has opted for completely new technologies, especially when it launched the Zen 1 architecture in 2017.
However, it appears that the latest Zen 3 architecture is affected by a vulnerability very similar to Specter.
Oops !? AMD Ryzen 5000 (Zen 3) has some vulnerabilities
Therefore, AMD confirmed that there is an optimization within the Zen 3 architecture, which could be the target of attacks very similar to those that Intel had to deal with a few months ago. However, although it is possible to disable the optimization .. AMD does not believe that this makes sense, because it involves a significant loss of performance.
In addition, there are other ways to turn the situation around, which have been implemented in architecture for a few generations of products.
Very briefly, the problem is in the PSF, a hardware optimization designed to improve the performance of code execution. (When predicting dependencies.) In other words, it’s a bit like branch prediction that has affected Intel processors in the past. In which the processor basically ‘guesses’ what will happen in the future. This in order to be faster in the execution of code.
Having said all this, despite the Ryzen 5000 and Epyc 7003 ranges being the target of this problem, and even after AMD claims that the consequences are very similar to the first Specter vulnerability … The manufacturer believes that the isolation of the address spaces is sufficient to avoid problems of greater.
In short, the security risk exists but it is “low”. Therefore, AMD recommends that all users leave the PSF on.
Furthermore, what do you think about all of this? Share your opinion with us in the comments below.
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