CVE-2026-52953: iommu/vt-d: Fix oops due to out of scope access

criticalCVSS 9.8CVE-2026-52953

CSIRTS triage

Other

What: This vulnerability involves an out of scope access issue in the iommu/vt-d subsystem.
Who is affected: Deployments using the iommu/vt-d subsystem.
Urgency: Remediation is critical urgency due to the critical severity rating.
Action: Apply the relevant patches to address the out of scope access.

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: critical — CVSS 9.8
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-52953

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-2026-529530.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-52953	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund

Recent advisories for iommu/vt-d

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-2026-53281: In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Avoid NULL poi…nvd · 2026-06-26