CVE-2026-64247: KVM: x86: hyper-v: Bound the bank index when querying sparse banks
CSIRTS triage
- What
- The bank index needs to be bounded when querying sparse banks to prevent potential issues.
- Who is affected
- Deployments using KVM on x86 architecture are affected.
- Urgency
- Remediation urgency is unknown as the severity is not specified.
- Action
- Monitor for updates regarding this issue.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64247
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.
- Low exploitation riskCVE-2026-642470.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-64247 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
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