---
id: CVE-2026-23137
title: 'of: unittest: Fix memory leak in unittest_data_add()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  of: unittest: Fix memory leak in unittest_data_add()

  In unittest_data_add(), if of_resolve_phandles() fails, the allocated
  unittest_data is not freed, leading to a mem…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 2eb46da2a760e5764c48b752a5ef320e02b96b21 <
    58baf98d1bdab897fd796f39a16061bade229d71
  - >-
    Linux >= 2eb46da2a760e5764c48b752a5ef320e02b96b21 <
    f09b0f705bd7197863b90256ef533a6414d1db2c
  - >-
    Linux >= 2eb46da2a760e5764c48b752a5ef320e02b96b21 <
    235a1eb8d2dcc49a6cf0a5ee1aa85544a5d0054b
  - Linux 3.18
published: '2026-02-14'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T11:58:10.749Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-23137'
references:
  - url: 'https://git.kernel.org/stable/c/58baf98d1bdab897fd796f39a16061bade229d71'
  - url: 'https://git.kernel.org/stable/c/f09b0f705bd7197863b90256ef533a6414d1db2c'
  - url: 'https://git.kernel.org/stable/c/235a1eb8d2dcc49a6cf0a5ee1aa85544a5d0054b'
tags:
  - cve.org
epss: 0.00125
epssPercentile: 0.01897
ingestedAt: '2026-09-14T15:23:07.459Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

of: unittest: Fix memory leak in unittest_data_add()

In unittest_data_add(), if of_resolve_phandles() fails, the allocated
unittest_data is not freed, leading to a memory leak.

Fix this by using scope-based cleanup helper __free(kfree) for automatic
resource cleanup. This ensures unittest_data is automatically freed when
it goes out of scope in error paths.

For the success path, use retain_and_null_ptr() to transfer ownership
of the memory to the device tree and prevent double freeing.

## Affected

- `Linux >= 2eb46da2a760e5764c48b752a5ef320e02b96b21 < 58baf98d1bdab897fd796f39a16061bade229d71`
- `Linux >= 2eb46da2a760e5764c48b752a5ef320e02b96b21 < f09b0f705bd7197863b90256ef533a6414d1db2c`
- `Linux >= 2eb46da2a760e5764c48b752a5ef320e02b96b21 < 235a1eb8d2dcc49a6cf0a5ee1aa85544a5d0054b`
- `Linux 3.18`

## Remediation

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