CVE-2026-68093: KVM: SVM: Bump asid_generation on CPU online to avoid ASID collision after hotplug

mediumCVSS 6.7CVE-2026-68093

CSIRTS triage

vendor: Linux product: Linux KernelOther

What: KVM SVM ASID collision vulnerability after CPU hotplug due to stale generation counter.
Who is affected: Hypervisor hosts using KVM with AMD SVM on systems with CPU hotplug capability.
Urgency: Medium priority; not exploited but could cause VM instability or information disclosure.
Action: Apply kernel security patch addressing ASID generation bump on CPU online.

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 6.7
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68093

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-2026-680930.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-68093	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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