CVE-2016-4440: arch/x86/kvm/vmx.c in the Linux kernel through 4.6.3 mishandles the APICv on/off state, which allows guest...

Security readout for executives and security teams

This Linux KVM flaw could let a user inside a virtual machine crash the host, and the CVE says host code execution may be possible. It affects Linux kernels through 4.6.3 in the KVM VMX path. The provided sources do not show active exploitation or a CVSS score. Exposure is most relevant to Linux virtualization hosts using KVM on x86 VMX with kernels through 4.6.3 or vendor kernels lacking the referenced fix. Environments running untrusted or multi-tenant guests carry higher business risk. Treat this as urgent for any legacy KVM virtualization estate, especially shared hosting or tenant-isolated environments. It threatens host stability and possibly the VM isolation boundary, but current sources do not prove active exploitation. Mitigation focus: Update affected Linux kernels to a version or vendor build containing commit 3ce424e45411.; Check Red Hat and distribution advisories for backported fixes and package-specific guidance.; Prioritize hosts running untrusted, customer, or multi-tenant virtual machines..

Prepared

Jun 13, 2026, 14:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.