Linux Kernel Flaw: 5 Alarming ARM64 KVM Risks The recent discovery of a Linux Kernel flaw that allows ARM64 KVM guests to gain read-write access to host memory is alarming. This vulnerability poses significant risks to cloud infrastructure and virtualized environments. In this post, I will dissect the implications of this flaw, explore its mechanisms, and provide actionable mitigation strategies. Understanding the Vulnerability The vulnerability stems from improper handling of memory access permissions within the ARM64 architecture's KVM (Kernel-based Virtual Machine) subsystem. When a guest VM is able to manipulate host memory, it can lead to unauthorized data access, potential data corruption, and even complete host compromise. Mechanism of the Flaw The flaw exploits the way KVM manages memory mappings. Specifically, it allows a guest VM to bypass the intended isolation between guest and host memory. This is particularly critical in multi-tenant environments where different...