---
id: CVE-2023-3338
title: >-
  A null pointer dereference flaw was found in the Linux kernel's DECnet
  networking protocol
summary: >-
  A null pointer dereference flaw was found in the Linux kernel's DECnet
  networking protocol. This issue could allow a remote user to crash the system.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
  - CWE-476
vendor: netapp
product: active_iq_unified_manager
affected:
  - linux_kernel < 6.5
  - active_iq_unified_manager
  - debian_linux = 10.0
  - debian_linux = 11.0
patched:
  - linux_kernel 6.5
published: '2023-06-30'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T21:17:16.457'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-3338'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2023-3338'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2218618'
    label: secalert@redhat.com
  - url: 'https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html'
    label: secalert@redhat.com
  - url: 'https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html'
    label: secalert@redhat.com
  - url: 'https://seclists.org/oss-sec/2023/q2/276'
    label: secalert@redhat.com
  - url: 'https://security.netapp.com/advisory/ntap-20230824-0005/'
    label: secalert@redhat.com
  - url: 'https://www.debian.org/security/2023/dsa-5480'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2023-3338'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2218618'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://seclists.org/oss-sec/2023/q2/276'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20230824-0005/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2023/dsa-5480'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - exploit-available
epss: 0.08289
epssPercentile: 0.94844
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/TurtleARM/CVE-2023-3338-DECPwn'
  checkedAt: '2026-10-14T21:57:39.234Z'
exploitAvailable: true
ingestedAt: '2026-10-14T21:57:04.736Z'
---

## Overview

A null pointer dereference flaw was found in the Linux kernel's DECnet networking protocol. This issue could allow a remote user to crash the system.

## Affected

- `linux_kernel < 6.5`
- `active_iq_unified_manager`
- `debian_linux = 10.0`
- `debian_linux = 11.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.5`