Hypervisor-From-Scratch

Hypervisor From Scratch A tutorial on creating a hypervisor from scratch All the parts » Part 1 · Part 2 · Part 3 · Part 4 · Part 5 · Part 6 · Part 7 · Part 8 If you're looking to use a hypervisor for analysis and reverse engineering tasks, check outHyperDbg Debugger. It's a hypervisor-based...

Unity Linux 20.1020e / 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-142504)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-142504 advisory. In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Hide shadow VMCS right after VMCLEAR freenested frees the shadow VMCS while vmcs01 sti...

AZL-109233 CVE-2026-98714 affecting package kernel 6.6.159.1-1

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Update control fields on VMEXIT if and only if VMRUN succeeded Leave control.erapctl and control.clean as-is in the VMCS if VMRUN fails, because as per AMD: there's no explicit architectural guarantee about the behavior...

CVE-2026-98714 KVM: SVM: Update control fields on #VMEXIT if and only if VMRUN succeeded

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Update control fields on VMEXIT if and only if VMRUN succeeded Leave control.erapctl and control.clean as-is in the VMCS if VMRUN fails, because as per AMD: there's no explicit architectural guarantee about the behavior...

CVE-2026-98714 KVM: SVM: Update control fields on #VMEXIT if and only if VMRUN succeeded

In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Update control fields on VMEXIT if and only if VMRUN succeeded Leave control.erapctl and control.clean as-is in the VMCS if VMRUN fails, because as per AMD: there's no explicit architectural guarantee about the behavior...

CVE-2026-98714

The Linux kernel contains a vulnerability in the KVM module related to SVM (AMD-V). The issue arises because control fields in the Virtual Machine Control Structure (VMCS) were being updated during a #VMEXIT even if the VMRUN instruction had failed. To ensure architectural consistency, the kernel...

Linux Distros Unpatched Vulnerability : CVE-2026-98714

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - KVM: SVM: Update control fields on VMEXIT if and only if VMRUN succeeded Leave control.erapctl and control.clean as-is in the VMCS if VMRUN fails, because as pe...

Astra Linux – vulnerability in linux-5.10, linux-5.15

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Fix crash due to uninitialized currentvmcs KVM enables ‘Enlightened VMCS’ and ‘Enlightened MSR Bitmap’ when running as a nested hypervisor on top of Hyper-V. When the MSR bitmap is updated, the evmcstouchmsrbitmap...

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: nVMX: Hiding the shadow VMCS right after VMCLEAR The freenested function frees the shadow VMCS while vmcs01 still points to it. However, because this operation is asynchronous relative to loadedvmcsclear, the vCPU might...

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...

UBUNTU-CVE-2026-72287

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Move vTPR vs. TPR Threshold consistency check into "normal" checks Move the off-by-default consistency check for vmcs12.tprthreshold vs. the virtual APIC vTPR into the "normal" controls checks, as waiting until KVM has...

CVE-2026-72287

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Move vTPR vs. TPR Threshold consistency check into "normal" checks Move the off-by-default consistency check for vmcs12.tprthreshold vs. the virtual APIC vTPR into the "normal" controls checks, as waiting until KVM has...

CVE-2026-72287 KVM: nVMX: Move vTPR vs. TPR Threshold consistency check into "normal" checks

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Move vTPR vs. TPR Threshold consistency check into "normal" checks Move the off-by-default consistency check for vmcs12.tprthreshold vs. the virtual APIC vTPR into the "normal" controls checks, as waiting until KVM has...

EUVD-2026-59186

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Move vTPR vs. TPR Threshold consistency check into "normal" checks Move the off-by-default consistency check for vmcs12.tprthreshold vs. the virtual APIC vTPR into the "normal" controls checks, as waiting until KVM has...

CVE-2026-72287

The CVE-2026-72287 entry covers a Linux kernel KVM nVMX issue where the vTPR vs. TPR Threshold consistency check was moved into normal checks. Affected component: KVM’s nested VMX path in the Linux kernel (vmcs12.tpr_threshold vs vTPR) and the handling of GUEST_CR3 when EPT is disabled. Reported ...

SUSE CVE-2026-68081

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Put vmcs12 pages if nested VM-Enter fails due to invalid guest state Put all vmcs12 pages if KVM synthesizes a nested VM-Exit due to invalid guest while emulating VMLAUNCH or VMRESUME. The invalid guest state path...

CVE-2026-68081

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Put vmcs12 pages if nested VM-Enter fails due to invalid guest state Put all vmcs12 pages if KVM synthesizes a nested VM-Exit due to invalid guest while emulating VMLAUNCH or VMRESUME. The invalid guest state path...

KVM: VMX: Grab vmcs12 on CR8 interception update iff vCPU is in guest mode

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SUSE CVE-2026-64604

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Grab vmcs12 on CR8 interception update iff vCPU is in guest mode When updating CR8 intercepts, get vmcs12 if and only if the vCPU is in guest mode so that a future change can have update CR8 intercepts during vCPU...

CVE-2026-64604

In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Grab vmcs12 on CR8 interception update iff vCPU is in guest mode When updating CR8 intercepts, get vmcs12 if and only if the vCPU is in guest mode so that a future change can have update CR8 intercepts during vCPU...