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CVE-2026-64430: NTB: epf: Avoid calling pci_irq_vector() from hardirq context

mediumCVSS 5.5CVE-2026-64430

CSIRTS triage

What
An issue exists with calling pci_irq_vector() from hardirq context.
Who is affected
Deployments using NTB may be affected.
Urgency
Remediation urgency is unclear due to unknown severity and exploitation status.
Action
Monitor for updates regarding this issue.

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-2026-64430

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-64430coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

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