---
id: CVE-2026-64220
title: 'device property: set fwnode->secondary to NULL in fwnode_init()'
summary: |-
  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 …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 01bb86b380a306bd937c96da36f66429f3362137 <
    f0e211d6539fae800217c10797993b7592d6ab01
  - >-
    Linux >= 01bb86b380a306bd937c96da36f66429f3362137 <
    3f1024deeab3b5443c29b3de4fe475e87309b8fa
  - >-
    Linux >= 01bb86b380a306bd937c96da36f66429f3362137 <
    371f53925a6714d0aa35f1aefdffc3e8cd62f480
  - >-
    Linux >= 01bb86b380a306bd937c96da36f66429f3362137 <
    34bf74b1fd2e4a44e27821a329204caf09df2976
  - >-
    Linux >= 01bb86b380a306bd937c96da36f66429f3362137 <
    508fd8ab158abd04b7f7d0f707cd6d6c405df4ea
  - >-
    Linux >= 01bb86b380a306bd937c96da36f66429f3362137 <
    f59e686c778cb41b8f7aa8fab2afd6a01afb3d47
  - >-
    Linux >= 01bb86b380a306bd937c96da36f66429f3362137 <
    215c90ee656114f5e8c32408228d97082f8e0eef
  - Linux 5.11
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:32:20.807519Z'
published: '2026-07-24'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:34:30.235Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-64220'
references:
  - url: 'https://git.kernel.org/stable/c/f0e211d6539fae800217c10797993b7592d6ab01'
  - url: 'https://git.kernel.org/stable/c/3f1024deeab3b5443c29b3de4fe475e87309b8fa'
  - url: 'https://git.kernel.org/stable/c/371f53925a6714d0aa35f1aefdffc3e8cd62f480'
  - url: 'https://git.kernel.org/stable/c/34bf74b1fd2e4a44e27821a329204caf09df2976'
  - url: 'https://git.kernel.org/stable/c/508fd8ab158abd04b7f7d0f707cd6d6c405df4ea'
  - url: 'https://git.kernel.org/stable/c/f59e686c778cb41b8f7aa8fab2afd6a01afb3d47'
  - url: 'https://git.kernel.org/stable/c/215c90ee656114f5e8c32408228d97082f8e0eef'
tags:
  - cve.org
epss: 0.00123
epssPercentile: 0.02082
ingestedAt: '2026-11-06T16:57:43.219Z'
---

## Overview

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.

## Affected

- `Linux >= 01bb86b380a306bd937c96da36f66429f3362137 < f0e211d6539fae800217c10797993b7592d6ab01`
- `Linux >= 01bb86b380a306bd937c96da36f66429f3362137 < 3f1024deeab3b5443c29b3de4fe475e87309b8fa`
- `Linux >= 01bb86b380a306bd937c96da36f66429f3362137 < 371f53925a6714d0aa35f1aefdffc3e8cd62f480`
- `Linux >= 01bb86b380a306bd937c96da36f66429f3362137 < 34bf74b1fd2e4a44e27821a329204caf09df2976`
- `Linux >= 01bb86b380a306bd937c96da36f66429f3362137 < 508fd8ab158abd04b7f7d0f707cd6d6c405df4ea`
- `Linux >= 01bb86b380a306bd937c96da36f66429f3362137 < f59e686c778cb41b8f7aa8fab2afd6a01afb3d47`
- `Linux >= 01bb86b380a306bd937c96da36f66429f3362137 < 215c90ee656114f5e8c32408228d97082f8e0eef`
- `Linux 5.11`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.