CVE-2021-3656-Demo

CVE-2021-3656: Este problema es causado por la falta de validación del campo virtext del VMCB y permite que un invitado L1 malicioso deshabilite tanto las interceptaciones de VMLOAD/VMSAVE como el VLS Virtual VMLOAD/VMSAVE para el invitado L2. Bajo estas circunstancias, el invitado L2 puede...

Januscape

Januscape：KVM/x86 环境中的客户机到宿主机逃逸 摘要 本文档描述了由 Hyunwoo Kim @v4bel 发现并报告的 Januscape CVE-2026-53359 漏洞。这是一个 KVM 逃逸漏洞，可使客户机在 KVM/x86 环境中逃逸至宿主机。据公开所知，这是首个可在 Intel 和 AMD 上触发而不仅限于单一架构的客户机到宿主机利用研究。 Januscape 是 KVM/x86 的 shadow MMU 模拟中的一个释放后使用漏洞。仅通过客户机侧操作即可触发该漏洞，破坏宿主机内核的影子页，并可能威胁那些接受不可信客户机并暴露嵌套虚拟化的 KVM/x86...

CVE-2026-80699

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM component for ARM64 architectures. This vulnerability, specifically affecting AmpereOne processors, occurs when a physical interrupt is double-deactivated in a nested virtualization context. An attacker could potentially...

hyperv_local_dos_poc

PoC de DoS en Hyper-V. Estos son archivos de código del proyecto de controlador de Visual Studio 2019. 1. Compilar el controlador. 2. Habilitar la virtualización anidada para el SO invitado usando el comando: root@kitploit: Set-VMProcessor -VMName -ExposeVirtualizationExtensions $true 3. Ejecutar...

KVM-Januscape

KVM-XJ: parche en caliente dumptool.py encuentra los offsets automáticamente; para saber cómo usarlo, lee el código tú mismo. Resumen de la vulnerabilidad CVE-2026-53359 Januscape es una vulnerabilidad de use-after-free UAF en el MMU sombra de KVM del kernel de Linux. Tiempo latente: 16 años agos...

Linux Distros Unpatched Vulnerability : CVE-2026-80665

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - KVM: arm64: nv: Inject SEA if kvmtranslatevncr can't resolve PFN kvmhandlevncrabort assumes that s1walkresult conveys an abort when kvmtranslatevncr returns...

UBUNTU-CVE-2026-80665

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Inject SEA if kvmtranslatevncr can't resolve PFN kvmhandlevncrabort assumes that s1walkresult conveys an abort when kvmtranslatevncr returns -EFAULT. This is not always the case as it's possible to encounter 'late...

CVE-2026-64561

CVE-2026-64561 — Zapscape:KVM/x86 shadow MMU UAF, escape do guest para o host root Imagem de distribuição HackSpeak. Este repositório é um espelho de distribuição do PoC completo + documentação técnica divulgados pelo pesquisador Hyunwoo Kim @v4bel , com código e documentação idênticos ao upstrea...

Zapscape

La trilogia dell'escape KVM ITScape CVE‑2026‑46316 | Januscape CVE‑2026‑53359 | Zapscape CVE‑2026‑64561 ---|---|--- Zapscape: Escape da guest a host in KVM/x86 Sommario Questo documento descrive la vulnerabilità Zapscape CVE-2026-64561 scoperta e segnalata da Hyunwoo Kim @v4bel. Si tratta di una...

CVE-2026-80665

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Inject SEA if kvmtranslatevncr can't resolve PFN kvmhandlevncrabort assumes that s1walkresult conveys an abort when kvmtranslatevncr returns -EFAULT. This is not always the case as it's possible to encounter 'late...

CVE-2026-80665

This vulnerability affects the Linux kernel's KVM arm64 nested virtualization subsystem. The root cause is in kvm_handle_vncr_abort() , which incorrectly assumes that a -EFAULT return from kvm_translate_vncr() always conveys an abort. In practice, "late" failures on S1 translation output (e.g., a...

EUVD-2026-67541

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Inject SEA if kvmtranslatevncr can't resolve PFN kvmhandlevncrabort assumes that s1walkresult conveys an abort when kvmtranslatevncr returns -EFAULT. This is not always the case as it's possible to encounter 'late...

CVE-2026-80665

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Inject SEA if kvmtranslatevncr can't resolve PFN kvmhandlevncrabort assumes that s1walkresult conveys an abort when kvmtranslatevncr returns -EFAULT. This is not always the case as it's possible to encounter 'late...

CVE-2026-80665 KVM: arm64: nv: Inject SEA if kvm_translate_vncr() can't resolve PFN

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Inject SEA if kvmtranslatevncr can't resolve PFN kvmhandlevncrabort assumes that s1walkresult conveys an abort when kvmtranslatevncr returns -EFAULT. This is not always the case as it's possible to encounter 'late...

CVE-2026-64562

A flaw was found in the Linux kernel's Kernel-based Virtual Machine KVM nested virtualization nVMX feature. This vulnerability occurs because the shadow Virtual Machine Control Structure VMCS is freed prematurely while still being referenced. Due to asynchronous operations, a virtual CPU vCPU mig...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Forcibly leave nested virtualization mode when SMM state is toggled The nested virtualization mode is forcibly exited if the user space toggles the SMM state using KVMSETVCPUEVENTS or KVMSYNCX86EVENTS. If the user space...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Remove the user-triggered WARN message emitted by nestedsvmloadcr3. Remove the WARN message generated by svmsetnestedstate in nestedsvmloadcr3 failure cases. This message can be easily triggered from userspace by...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Ignore nCR34:0 when loading PDPTEs from memory Ignore nCR34:0 when loading PDPTEs from memory for nested SVMs. When PAE paging is used, the bits 4:0 of the CR3 register are ignored, and thus VMRUN does not enforce a...

CVE-2026-74516

A flaw was found in KVM Kernel-based Virtual Machine. When the Advanced Virtual Interrupt Controller AVIC is inhibited while a nested guest L2 is active, KVM fails to properly update x2APIC MSR intercepts for the primary guest L1. This allows the L1 guest to read the host's APIC state, send...

CVE-2026-72279

A flaw was found in the KVM Kernel-based Virtual Machine component of the Linux kernel. KVM on arm64 architectures incorrectly maps the L1 Virtual Nested Control Register VNCR into the host stage-1, failing to respect read-only memory regions. This could allow a malicious guest to write to a...