Linux Kernel fwnode_init Uninitialized Secondary Pointer Vulnerability
CVE-2026-68461 Published on August 15, 2026
device property: initialize the remaining fields of fwnode_handle in fwnode_init()
In the Linux kernel, the following vulnerability has been resolved:
device property: initialize the remaining fields of fwnode_handle 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 uninitialized 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. While at it: initialize the remaining fields of struct
fwnode_handle too just to be sure.
[ Fix typo in commit message. - Danilo ]
Products Associated with CVE-2026-68461
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Affected Versions
Linux:- Version 01bb86b380a306bd937c96da36f66429f3362137 and below 0198d579948322cda5178b9672d448375a32f947 is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below 173b61c9276c7b3a5fbcc63ae7aafc897fee1e18 is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below f0b4e1cc8ad76baf49d898727eb52e91a4ef0544 is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below c8542b68ba6ef4f61072098893a3f5b71c569b6c is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below 9c86a1f930bb2ddb85f867b4736716e82a4a4683 is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below c81e2af41de6a159837c7129a4fc444ac6e48046 is affected.
- Version 01bb86b380a306bd937c96da36f66429f3362137 and below 7eba000621fff223dd7bab484d48918c7c77a307 is affected.
- Version 5.11 is affected.
- Before 5.11 is unaffected.
- Version 5.15.212, <= 5.15.* is unaffected.
- Version 6.1.178, <= 6.1.* is unaffected.
- Version 6.6.145, <= 6.6.* is unaffected.
- Version 6.12.96, <= 6.12.* is unaffected.
- Version 6.18.39, <= 6.18.* is unaffected.
- Version 7.1.5, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.