---
id: CVE-2026-98667
title: 'iio: frequency: adf4377: Fully initialize clk_init_data and clk_parent_data'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  iio: frequency: adf4377: Fully initialize clk_init_data and clk_parent_data

  The clk_init_data structure contains several mutually-exclusive members
  for different metho…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 60e5448ddbec2dc206027a4850604d8fdf9973b7 <
    6564f394a4a95fad534643a6ca0f1d36ff081799
  - >-
    Linux >= 60e5448ddbec2dc206027a4850604d8fdf9973b7 <
    e787fd23d5063c61582c3c27522240b6e6703fde
  - Linux 7.0
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:44:51.640Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98667'
references:
  - url: 'https://git.kernel.org/stable/c/6564f394a4a95fad534643a6ca0f1d36ff081799'
  - url: 'https://git.kernel.org/stable/c/e787fd23d5063c61582c3c27522240b6e6703fde'
tags:
  - cve.org
ingestedAt: '2026-10-18T16:47:32.533Z'
---

## Overview

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

iio: frequency: adf4377: Fully initialize clk_init_data and clk_parent_data

The clk_init_data structure contains several mutually-exclusive members
for different methods to specify the possible parents of a clock,
prompting drivers to initialize only the members they need.  However,
not initializing all members may cause subtle issues, which are only
exposed when CONFIG_INIT_STACK_ALL_PATTERN or CONFIG_INIT_STACK_NONE is
enabled.

adf4377_clk_register() fills in init.parent_data, and assumes that
init.parent_names is NULL.  However, the latter is uninitialized, and
thus may cause a crash.

Similarly, adf4377_clk_register() fills in only parent_data.fw_name,
leaving other members of the clk_parent_data structure uninitialized.

Make sure all members are fully initialized, to fix such bugs, and to
avoid future breakage when converting drivers to a different method for
specifying the parents.

## Affected

- `Linux >= 60e5448ddbec2dc206027a4850604d8fdf9973b7 < 6564f394a4a95fad534643a6ca0f1d36ff081799`
- `Linux >= 60e5448ddbec2dc206027a4850604d8fdf9973b7 < e787fd23d5063c61582c3c27522240b6e6703fde`
- `Linux 7.0`

## Remediation

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