device property: initialize the remaining fields of fwnode_handle in fwnode_init()

Summary

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 ]

Timeline

1. Aug 15, 2026, 5:51 AM UTCCVE published
2. Oct 16, 2026, 3:49 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 19, 2026, 9:09 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 01bb86b380a306bd937c96da36f66429f3362137 · fixed in 0198d579948322cda5178b9672d448375a32f947; From 01bb86b380a306bd937c96da36f66429f3362137 · fixed in 173b61c9276c7b3a5fbcc63ae7aafc897fee1e18; From 01bb86b380a306bd937c96da36f66429f3362137 · fixed in f0b4e1cc8ad76baf49d898727eb52e91a4ef0544; From 01bb86b380a306bd937c96da36f66429f3362137 · fixed in c8542b68ba6ef4f61072098893a3f5b71c569b6c; From 01bb86b380a306bd937c96da36f66429f3362137 · fixed in 9c86a1f930bb2ddb85f867b4736716e82a4a4683; From 01bb86b380a306bd937c96da36f66429f3362137 · fixed in c81e2af41de6a159837c7129a4fc444ac6e48046; From 01bb86b380a306bd937c96da36f66429f3362137 · fixed in 7eba000621fff223dd7bab484d48918c7c77a307

• Linux Linux

  5.11

• KernelLinux

  From 5.11.0 · fixed in 5.15.212; From 5.16.0 · fixed in 6.1.178; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.96; From 6.13.0 · fixed in 6.18.39; From 6.19.0 · fixed in 7.1.5

References 7