---
id: CVE-2026-109951
title: >-
  FreeRDP 3.17.1 before 3.32.0 contains a heap buffer over-read vulnerability in
  DynvcTrackerHandleCreateBack of the freerdp-proxy DRDYNVC channel handler that
  allows malicious backend RDP servers to read heap memory out of bounds
summary: >-
  FreeRDP 3.17.1 before 3.32.0 contains a heap buffer over-read vulnerability in
  DynvcTrackerHandleCreateBack of the freerdp-proxy DRDYNVC channel handler that
  allows malicious backend RDP servers to read heap memory out of bounds.
  Attacke…
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'
cwe:
  - CWE-125
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T14:17:33.723'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109951'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-g4wg-67xq-8q53'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-3.17.1-before-3.32.0-heap-buffer-over-read-via-proxy-drdynvc-channel-name
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-13T14:29:01.853Z'
---

## Overview

FreeRDP 3.17.1 before 3.32.0 contains a heap buffer over-read vulnerability in DynvcTrackerHandleCreateBack of the freerdp-proxy DRDYNVC channel handler that allows malicious backend RDP servers to read heap memory out of bounds. Attackers can send a CREATE_REQUEST_PDU whose channel name lacks a NUL byte, causing an unbounded snprintf read that leaks memory into proxy logs or crashes the process.

## Remediation

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