---
id: CVE-2026-111373
title: FreeRDP before 3.32.0 NULL Dereference via Zero-Length WebSocket Ping
summary: >-
  FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the
  websocket transport that allows a malicious gateway to crash clients by
  sending zero-length pings. When the payload length is zero,
  websocket_reply_pong passe…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cvssSource: cna
cwe:
  - CWE-476
vendor: FreeRDP
product: FreeRDP
affected:
  - FreeRDP < 3.32.0
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T01:17:40.463Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111373'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-83g2-gf92-5c4g'
    label: GitHub Security Advisory (GHSA-83g2-gf92-5c4g)
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-before-3.32.0-null-dereference-via-zero-length-websocket-ping
    label: >-
      VulnCheck Advisory: FreeRDP before 3.32.0 NULL Dereference via Zero-Length
      WebSocket Ping
tags:
  - cve.org
ingestedAt: '2026-10-16T01:55:57.994Z'
---

## Overview

FreeRDP before 3.32.0 contains a NULL pointer dereference vulnerability in the websocket transport that allows a malicious gateway to crash clients by sending zero-length pings. When the payload length is zero, websocket_reply_pong passes a nullptr stream to websocket_reply_close, triggering an assertion failure that terminates the client process and causes denial of service.

## Affected

- `FreeRDP < 3.32.0`

## Remediation

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