CVE-2026-64286: KVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU
CSIRTS triage
- What
- There is a vulnerability related to clearing __hyp_running_vcpu when flushing the pKVM hyp vCPU.
- Who is affected
- Deployments using KVM are affected.
- Urgency
- Remediation urgency is unknown due to lack of severity information and exploitation status.
- Action
- Monitor for updates regarding this vulnerability.
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-2026-64286
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-2026-642860.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-64286 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
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