---
id: CVE-2023-6679
title: >-
  Kernel: null pointer dereference in dpll_pin_parent_pin_set() in
  drivers/dpll/dpll_netlink.c
summary: >-
  A null pointer dereference vulnerability was found in
  dpll_pin_parent_pin_set() in drivers/dpll/dpll_netlink.c in the Digital Phase
  Locked Loop (DPLL) subsystem in the  Linux kernel. This issue could be
  exploited to trigger a denial of s…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-476
vendor: Red Hat
product: kernel
affected:
  - kernel (all versions)
  - kernel (all versions)
  - kernel (all versions)
  - kernel-rt (all versions)
  - kernel
  - kernel
  - kernel-rt
  - kernel
  - kernel-rt
  - kernel-rt (all versions)
published: '2023-12-11'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T13:40:23.189Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-6679'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2024:0439'
    label: 'RHSA-2024:0439'
  - url: 'https://access.redhat.com/errata/RHSA-2024:0448'
    label: 'RHSA-2024:0448'
  - url: 'https://access.redhat.com/errata/RHSA-2024:0461'
    label: 'RHSA-2024:0461'
  - url: 'https://access.redhat.com/security/cve/CVE-2023-6679'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2253986'
    label: RHBZ#2253986
  - url: 'https://lore.kernel.org/netdev/20231211083758.1082853-1-jiri@resnulli.us/'
tags:
  - cve.org
epss: 0.00312
epssPercentile: 0.24249
ingestedAt: '2026-11-06T13:52:17.101Z'
---

## Overview

A null pointer dereference vulnerability was found in dpll_pin_parent_pin_set() in drivers/dpll/dpll_netlink.c in the Digital Phase Locked Loop (DPLL) subsystem in the  Linux kernel. This issue could be exploited to trigger a denial of service.

## Affected

- `kernel (all versions)`
- `kernel (all versions)`
- `kernel (all versions)`
- `kernel-rt (all versions)`
- `kernel`
- `kernel`
- `kernel-rt`
- `kernel`
- `kernel-rt`
- `kernel-rt (all versions)`

## Remediation

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

### Workarounds

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.