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CVE-2026-63794: KVM: SVM: Fix page overflow in sev_dbg_crypt() for ENCRYPT path

highCVSS 7.8CVE-2026-63794

CSIRTS triage

vendor: KVMproduct: KVMOther
What
The vulnerability fixes a page overflow in the sev_dbg_crypt() function for the ENCRYPT path.
Who is affected
Deployments of KVM that utilize secure virtualization features.
Urgency
Remediation is necessary to prevent potential security issues in encrypted environments.
Action
Update to the latest version of KVM.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.8
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63794

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-2026-63794coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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