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CVE-2026-64220

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: device property: set fwnode->secondary to NULL in fwnode_init() If a firmware node is allocated on the stack (for instance: tem…

Published Jul 24, 2026CWE-908EPSS 0.12%

Overview

CVE-2026-64220 is a medium-severity vulnerability. It was published on July 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

device property: set fwnode->secondary to NULL in fwnode_init()

If a firmware node is allocated on the stack (for instance: temporary

software node whose life-time we control) or on the heap - but using a

non-zeroing allocation function - and initialized using fwnode_init(),

its secondary pointer will contain uninitalized memory which likely will

be neither NULL nor IS_ERR() and so may end up being dereferenced (for

example: in dev_to_swnode()). Set fwnode->secondary to NULL on

initialization.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/215c90ee656114f5e8c32408228d97082f8e0eefRefgit.kernel.org/stable/c/34bf74b1fd2e4a44e27821a329204caf09df2976Refgit.kernel.org/stable/c/371f53925a6714d0aa35f1aefdffc3e8cd62f480Refgit.kernel.org/stable/c/3f1024deeab3b5443c29b3de4fe475e87309b8faRefgit.kernel.org/stable/c/508fd8ab158abd04b7f7d0f707cd6d6c405df4eaRefgit.kernel.org/stable/c/f0e211d6539fae800217c10797993b7592d6ab01Refgit.kernel.org/stable/c/f59e686c778cb41b8f7aa8fab2afd6a01afb3d47

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64220?

CVE-2026-64220 is a medium-severity vulnerability. It was published on July 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-64220?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-64220?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-64220?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64220 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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