AMD released patches to address the Sinkclose vulnerability, but not all chips are covered. The company also said 'No performance impact expected', which means that its likely still conducting final validation and testing of the patch and how it impacts the overall performance of the system.

AMD is warning about a high-severity CPU vulnerability named SinkClose that impacts multiple generations of its EPYC, Ryzen, and Threadripper processors. The vulnerability allows attackers with Kernel-level (Ring 0) privileges to gain Ring -2 privileges and install malware that becomes nearly undetectable.

Researchers warn that a bug in AMD’s chips would allow attackers to root into some of the most privileged portions of a computer—and that it has persisted in the company’s processors for decades.