PT-2026-72475

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the KVM nVMX component where the consistency check between vmcs12.tpr threshold and the virtual APIC vTPR was performed too late in the process. When EPT Extended Page...

CVE-2013-4551

Xen 4.2.x and 4.3.x, when nested virtualization is disabled, does not properly check the emulation paths for 1 VMLAUNCH and 2 VMRESUME, which allows local HVM guest users to cause a denial of service host crash via unspecified vectors related to "guest VMX instruction execution."...

PT-2013-5067

Name of the Vulnerable Software and Affected Versions Xen versions 4.2.x through 4.3.x Description The issue allows local HVM guest users to cause a denial of service, specifically a host crash, via unspecified vectors related to guest VMX instruction execution. This occurs when nested...

Host crash due to guest VMX instruction execution

ISSUE DESCRIPTION Permission checks on the emulation paths intended for guests using nested virtualization for VMLAUNCH and VMRESUME were deferred too much. The hypervisor would try to use internal state which is not set up unless nested virtualization is actually enabled for a guest. IMPACT A...