CVE-2026-64220

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.

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EPSS — Exploit Prediction

0.0017

Probability of exploitation

0.07%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/215c90ee656114f5e8c32408228d97082f8e0eef https://git.kernel.org/stable/c/34bf74b1fd2e4a44e27821a329204caf09df2976 https://git.kernel.org/stable/c/371f53925a6714d0aa35f1aefdffc3e8cd62f480 https://git.kernel.org/stable/c/3f1024deeab3b5443c29b3de4fe475e87309b8fa https://git.kernel.org/stable/c/508fd8ab158abd04b7f7d0f707cd6d6c405df4ea https://git.kernel.org/stable/c/f0e211d6539fae800217c10797993b7592d6ab01 https://git.kernel.org/stable/c/f59e686c778cb41b8f7aa8fab2afd6a01afb3d47

Frequently Asked Questions

What is CVE-2026-64220? +

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.

How do I check if I'm vulnerable to CVE-2026-64220? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.