CVE-2026-64474: vfio: prevent infinite loop in vfio_mig_get_next_state() on blocked arc

mediumCVSS 5.5CVE-2026-64474

CSIRTS triage

Other

What: An infinite loop is prevented in the function vfio_mig_get_next_state() on blocked arc.
Who is affected: Deployments using VFIO for device management.
Urgency: Remediation is necessary to prevent system hangs, with no current exploitation reported.
Action: Update to the patched version once it is released.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64474

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-2026-644740.18% 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-2026-64474	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownCVE-2026-64474: In the Linux kernel, the following vulnerability has been resolved: vfio: prevent infinite loo…nvd

Recent advisories for vfio

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.

unknownCVE-2026-64476: In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Latch disable_id…nvd · 2026-07-25
unknownCVE-2026-64474: In the Linux kernel, the following vulnerability has been resolved: vfio: prevent infinite loo…nvd · 2026-07-25
unknownCVE-2026-64473: In the Linux kernel, the following vulnerability has been resolved: vfio: Remove device debugf…nvd · 2026-07-25
highCVE-2026-53322: In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Clean up DMABUFs…nvd · 2026-06-26
unknownCVE-2026-53305: In the Linux kernel, the following vulnerability has been resolved: usb: typec: ps883x: Fix Oo…nvd · 2026-06-26