AMD Rolls Out Patches To Disable Predictive Store Forwarding on Zen 3 CPUs | #linux | #linuxsecurity


Making good on its promise, AMD has deployed new patches to the Linux kernel to mitigate the potential security risk with the Predictive Store Forwarding (PSF) feature. Linux publication Phoronix spotted five patches that allow users to disable Predictive Store Forwarding if security is a concern.

Predictive Store Forwarding is a feature baked into AMD’s Zen 3 processors that boosts code execution performance by predicting the relationship between loads and stores. In AMD’s whitepaper, the chipmaker exposed the benefits and security complications with Predictive Store Forwarding. The vulnerability is similar to Spectre v4 that affected Intel processors. We reached out to AMD about the feature, and the chipmaker responded with this statement:



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