CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's KVM module, specifically in the handling of the SPSR_EL2 register during nested virtualization scenarios. This oversight can lead to improper state management, potentially allowing an attacker to exploit the system and gain elevated privileges. Organizations utilizing Linux with KVM for virtualization should prioritize this fix to mitigate the risk of unauthorized access and system compromise.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Fix SPSR_EL2 restore in kvm_hyp_handle_mops() kvm_hyp_handle_mops() resets the single-step state machine as part of rewinding state for a MOPS exception by modifying vcpu_cpsr() and writing the result directly into hardware. In the case of nested virtualization, vcpu_cpsr() is a synthetic value such that the rest of KVM can deal with vEL2 cleanly. That means the value requires translation before being written into hardware, which is unfortunately missing from the MOPS handler. Fix it by directly modifying SPSR_EL2 and avoiding the synthetic state altogether, which will be resynchronized on the next 'full' exit back to KVM.