Microsoft Hyper-V: vmswitch fails to validate guest OID requests - guest reads arbitrary host kernel memory or crashes the host

CVE-2021-28476Kernel, userspace & hypervisorcurated

Impact

vmswitch fails to validate guest OID requests - guest reads arbitrary host kernel memory or crashes the host; the highest-rated Hyper-V escape class

Who can reach it

Tenant VM guest

What to do

Windows update + host reboot with live-migration

References

https://nvd.nist.gov/vuln/detail/CVE-2021-28476

This entry is curated: imported from vendor advisories with machine assistance, not yet individually verified. Confirm against your vendor's advisory before acting, and report anything wrong.