CVE-2026-74607: KVM: SVM: Serialize accesses to the owner and mirror list with separate lock

mediumCVSS 5.7CVE-2026-74607

CSIRTS triage

vendor: Linux product: Linux Kernel Memory corruption

What: Race condition in KVM SVM code where accesses to the owner and mirror list lack proper synchronization.
Who is affected: Hypervisors running KVM with SVM support on vulnerable kernel versions.
Urgency: Medium urgency; not currently exploited but race conditions can cause data corruption or crashes.
Action: Apply kernel patch adding separate lock serialization for owner and mirror list accesses in KVM SVM.

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

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.7
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74607

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-2026-746070.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-74607	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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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.

highCVE-2026-74607: In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Serialize access…nvd · 2026-08-22
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