---
id: CVE-2023-6176
title: 'Kernel: local dos vulnerability in scatterwalk_copychunks'
summary: >-
  A null pointer dereference flaw was found in the Linux kernel API for the
  cryptographic algorithm scatterwalk functionality. This issue occurs when a
  user constructs a malicious packet with specific socket configuration, which
  could allo…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
vendor: Red Hat
product: kernel-rt
affected:
  - kernel-rt (all versions)
  - kernel (all versions)
  - kernel (all versions)
  - kernel (all versions)
  - kernel
  - kernel
  - kernel-rt (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2025-10-17T17:18:19.685968Z'
published: '2023-11-16'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T13:40:17.549Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-6176'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2024:2394'
    label: 'RHSA-2024:2394'
  - url: 'https://access.redhat.com/errata/RHSA-2024:2950'
    label: 'RHSA-2024:2950'
  - url: 'https://access.redhat.com/errata/RHSA-2024:3138'
    label: 'RHSA-2024:3138'
  - url: 'https://access.redhat.com/security/cve/CVE-2023-6176'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2219359'
    label: RHBZ#2219359
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cfaa80c91f6f99b9342b6557f0f0e1143e434066
tags:
  - cve.org
epss: 0.00251
epssPercentile: 0.16583
ingestedAt: '2026-11-06T13:52:17.104Z'
---

## Overview

A null pointer dereference flaw was found in the Linux kernel API for the cryptographic algorithm scatterwalk functionality. This issue occurs when a user constructs a malicious packet with specific socket configuration, which could allow a local user to crash the system or escalate their privileges on the system.

## Affected

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

## Remediation

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