Xen 3.1 through 4.x, when running 64-bit hosts on Intel CPUs, does not clear the NT flag when using an IRET after a SYSENTER instruction, which allows PV guest users to cause a denial of service (hypervisor crash) by triggering a #GP fault, which is not properly handled by another IRET instruction.
Publish Date : 2013-05-13 Last Update Date : 2014-04-19
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify
a vulnerability or a missing patch. Check out the OVAL definitions
if you want to learn what you should do to verify a vulnerability.