---
id: CVE-2026-96423
title: >-
  X11 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows
  denial of service
summary: >-
  X11 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows
  denial of service
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-122
vendor: Wireshark Foundation
product: Wireshark
affected:
  - Wireshark >= 4.6.0 < 4.6.9
  - Wireshark >= 4.4.0 < 4.4.19
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T10:17:17.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-96423'
references:
  - url: 'https://gitlab.com/wireshark/wireshark/-/work_items/21563'
    label: cve@gitlab.com
  - url: 'https://www.wireshark.org/security/wnpa-sec-2026-108.html'
    label: cve@gitlab.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-29T10:31:36.323Z'
---

## Overview

X11 protocol dissector crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service

## Remediation

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