CVE-2026-64376: firmware_loader: fix device reference leak in firmware_upload_register()

highCVSS 7.1CVE-2026-64376

CSIRTS triage

vendor: Linux product: Firmware LoaderOther

What: There is a device reference leak in firmware_upload_register().
Who is affected: Deployments using the firmware loader.
Urgency: Remediation is important to prevent resource leaks, but no exploitation is reported.
Action: Update the firmware loader to the latest version.

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

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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-2026-64376

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-2026-643760.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64376	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownCVE-2026-64376: In the Linux kernel, the following vulnerability has been resolved: firmware_loader: fix devic…nvd

Recent advisories for firmware_loader

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-2026-64376: In the Linux kernel, the following vulnerability has been resolved: firmware_loader: fix devic…nvd · 2026-07-25