---
id: CVE-2023-3106
title: 'Kernel: netlink socket crash (null pointer deref) in netlink_dump function'
summary: >-
  A NULL pointer dereference vulnerability was found in netlink_dump. This issue
  can occur when the Netlink socket receives the message(sendmsg) for the
  XFRM_MSG_GETSA, XFRM_MSG_GETPOLICY type message, and the DUMP flag is set and
  can caus…
severity: medium
cvss: 6.6
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-476
vendor: Red Hat
product: kernel
affected:
  - kernel
  - kernel
  - kernel-rt
  - kernel
  - kernel-rt
  - kernel
  - kernel-rt
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-02-15T17:02:08.460942Z'
published: '2023-07-12'
updated: '2026-11-07'
sourceUpdated: '2026-11-07T05:01:45.352Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-3106'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2023-3106'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2221501'
    label: RHBZ#2221501
  - url: >-
      https://github.com/torvalds/linux/commit/1ba5bf993c6a3142e18e68ea6452b347f9cb5635
tags:
  - cve.org
epss: 0.003
epssPercentile: 0.22805
ingestedAt: '2026-11-07T05:10:28.777Z'
---

## Overview

A NULL pointer dereference vulnerability was found in netlink_dump. This issue can occur when the Netlink socket receives the message(sendmsg) for the XFRM_MSG_GETSA, XFRM_MSG_GETPOLICY type message, and the DUMP flag is set and can cause a denial of service or possibly another unspecified impact. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although it is unlikely.

## Affected

- `kernel`
- `kernel`
- `kernel-rt`
- `kernel`
- `kernel-rt`
- `kernel`
- `kernel-rt`

## Remediation

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