Kostya Kortchinsky pointed out some Hyper-V bugs recently fixed in Chromium, all 3 are listed as being fixed 4 days ago.
https://bugs.chromium.org/p/project-zero/issues/detail?id=688
Hyper-V vmswitch.sys VmsMpCommonPvtHandleMulticastOids Guest to Host Kernel-Pool Overflow
https://bugs.chromium.org/p/project-zero/issues/detail?id=689
Hyper-V vmswitch.sys VmsVmNicHandleRssParametersChange OOBR Guest to Host BugChecks
https://bugs.chromium.org/p/project-zero/issues/detail?id=690
Hyper-V vmswitch.sys VmsPtpIpsecTranslateAddv2toAddv2Ex OOBR Guest to Host BugCheck
Firmware Security 