Cache Line Write-back Vulnerability in AMD CPUs Affected by Malicious Hypervisors

CVE-2023-20592

Summary

A vulnerability exists within certain AMD CPUs due to improper behavior of the INVD instruction when controlled by a malicious hypervisor. This flaw allows attackers to manipulate the cache line write-back mechanisms of the CPU, potentially compromising the memory integrity of guest virtual machines. As a result, sensitive data within virtual environments may be exposed to unauthorized access, posing a serious risk to cloud services and virtualization platforms.

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