CVE-2026-64220 is a vulnerability in Linux Kernel
Published on July 24, 2026
device property: set fwnode->secondary to NULL in fwnode_init()
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.
Products Associated with CVE-2026-64220
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Affected Versions
Linux:- Version 01bb86b380a306bd937c96da36f66429f3362137 and below f0e211d6539fae800217c10797993b7592d6ab01 is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below 3f1024deeab3b5443c29b3de4fe475e87309b8fa is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below 371f53925a6714d0aa35f1aefdffc3e8cd62f480 is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below 34bf74b1fd2e4a44e27821a329204caf09df2976 is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below 508fd8ab158abd04b7f7d0f707cd6d6c405df4ea is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below f59e686c778cb41b8f7aa8fab2afd6a01afb3d47 is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below 215c90ee656114f5e8c32408228d97082f8e0eef is affected.
- Version 5.11 is affected.
- Before 5.11 is unaffected.
- Version 5.15.209, <= 5.15.* is unaffected.
- Version 6.1.175, <= 6.1.* is unaffected.
- Version 6.6.142, <= 6.6.* is unaffected.
- Version 6.12.92, <= 6.12.* is unaffected.
- Version 6.18.34, <= 6.18.* is unaffected.
- Version 7.0.11, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.