---
id: CVE-2026-109946
title: >-
  FreeRDP 3.11.0 before 3.32.0 does not validate that AVC444 and AVC444v2 region
  widths are even before YUV444 conversion, so an odd width reaches an assertion
  and aborts the client
summary: >-
  FreeRDP 3.11.0 before 3.32.0 does not validate that AVC444 and AVC444v2 region
  widths are even before YUV444 conversion, so an odd width reaches an assertion
  and aborts the client. A malicious or compromised RDP server can terminate a
  co…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-617
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T14:17:32.820'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109946'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-97pf-pwp3-2wrv'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-3.11.0-before-3.32.0-reachable-assertion-via-avc444-odd-region-width
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-13T14:29:01.851Z'
---

## Overview

FreeRDP 3.11.0 before 3.32.0 does not validate that AVC444 and AVC444v2 region widths are even before YUV444 conversion, so an odd width reaches an assertion and aborts the client. A malicious or compromised RDP server can terminate a connected FreeRDP client after RDPGFX AVC444 negotiation by sending an in-bounds region rectangle with an odd width.

## Remediation

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