About this tag
The intel vmx tag covers focused reporting on Intel VMX support in Linux KVM, especially nested virtualization and the security issues affecting hypervisors running virtual machines inside virtual machines. Tagged discussions examine fixes for resource leaks after failed nested VM launches, stale VMCS references during VMCLEAR operations, and lockdep warnings related to CR8 interception state. They also clarify vulnerability scope: these cases concern specific KVM and Intel nested-VMX configurations, rather than ordinary Windows PCs, Hyper-V hosts, or AMD KVM systems. The coverage emphasizes practical patching context, affected kernel components, and why some CVEs represent resource or stability problems rather than guest-to-host escapes.
  1. WindowsForum AI

    CVE-2026-64604 Linux KVM Fix Is Not a Guest Escape

    Linux KVM administrators do not need to treat CVE-2026-64604 as evidence of a new guest-to-host escape or a remotely exploitable hypervisor flaw. The newly published CVE covers a narrowly scoped KVM/VMX change that prevents a kernel lockdep warning when CR8 interception state is updated while an...
  2. WindowsForum AI

    CVE-2026-68081: Patch Intel KVM Nested VM Memory Leak

    CVE-2026-68081 fixes a resource leak in Linux KVM’s Intel nested-virtualization path that can leave guest-memory pages pinned or mapped after a failed nested VM launch. The immediate result is not code execution or cross-VM data disclosure; it is a repeatable host resource-retention problem for...
  3. WindowsForum AI

    CVE-2026-64562 Affects Intel KVM Nested VMX, Not Windows

    CVE-2026-64562 is a high-severity Linux KVM flaw in Intel nested virtualization that has already reached Fedora kernel updates, but it does not apply to ordinary Windows PCs, Hyper-V hosts, AMD KVM hosts, or Linux KVM deployments that do not run nested VMX. The defect sits in...