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CVE-2026-64604: KVM: VMX: Grab vmcs12 on CR8 interception update iff vCPU is in guest mode

highCVSS 8.4CVE-2026-64604

CSIRTS triage

Other
What
High severity vulnerability identified as CVE-2026-64604 with CVSS 8.4.
Who is affected
Specific vendor and product information not available in advisory.
Urgency
High severity requires immediate investigation and remediation planning.
Action
Obtain full advisory details including vendor, product, and affected versions to determine impact and remediation.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8.4
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64604

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-64604coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for KVM

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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