CVE-2026-64428: gpio: sch: use raw_spinlock_t in the irq startup path

CSIRTS triage

What

This vulnerability involves the use of raw_spinlock_t in the IRQ startup path for GPIO.

Who is affected

Deployments using the GPIO subsystem.

Urgency

Remediation is advised to ensure proper synchronization, with no current exploitation reported.

Action

Apply the patch for CVE-2026-64428.

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 7.1

Published

2026-07-14

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64428

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-2026-644280.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• unknownDSA-6405-1 linux - security updatedebian
• unknownCVE-2026-64428: In the Linux kernel, the following vulnerability has been resolved: gpio: sch: use raw_spinloc…nvd

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