CyberRota Analysis
AI-GeneratedA vulnerability in the Linux kernel affects the KVM component for arm64 architecture, where the improper handling of the __hyp_running_vcpu variable during context flushing can lead to unauthorized memory access at the EL2 privilege level. This flaw could allow an attacker to exploit the hypervisor, potentially leading to privilege escalation or data leakage. Organizations using affected Linux distributions, particularly those running virtualized environments on arm64 architecture, should prioritize applying the patch to mitigate these risks.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU flush_hyp_vcpu() copies the host vCPU context into the hyp's private vCPU on every run. ctxt_to_vcpu() expects a guest context to have a NULL __hyp_running_vcpu, which is only ever set on the host context, so that it resolves the vCPU via container_of(). While this is generally the case, flush_hyp_vcpu() copies the context verbatim and does not enforce this, so a value provided by the host is dereferenced at EL2 (host -> EL2). Fix by clearing __hyp_running_vcpu after the copy.
Related CVEs
Other vulnerabilities affecting the same vendor(s)