CVE-2026-64475: vfio/pci: Release the VGA arbiter client on register_device() failure

highCVSS 8.8CVE-2026-64475

CSIRTS triage

Other

What: The VGA arbiter client is not released on register_device() failure.
Who is affected: Deployments using vfio/pci.
Urgency: Remediation is necessary to prevent resource leaks.
Action: Apply the relevant patches once available.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8.8
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64475

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-2026-644750.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64475	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highCVE-2026-64475: In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Release the VGA …nvd

Recent advisories for vfio/pci

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
highCVE-2026-64475: In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Release the VGA …nvd · 2026-07-25
highCVE-2026-64042: In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Check BAR resour…nvd · 2026-07-19
highCVE-2026-64476: vfio/pci: Latch disable_idle_d3 per devicemsrc · 2026-07-14
highCVE-2026-53322: In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Clean up DMABUFs…nvd · 2026-06-26