---
id: CVE-2026-85090
title: >-
  FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the
  general_ChromaV1ToYUV444 function during AVC444 chroma plane reconstruction
summary: >-
  FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the
  general_ChromaV1ToYUV444 function during AVC444 chroma plane reconstruction. A
  malicious RDP server can craft a RFX_AVC444_BITMAP_STREAM with specific frame
  ge…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L'
cwe:
  - CWE-125
vendor: freerdp
product: freerdp
affected:
  - freerdp < 3.31.0
patched:
  - freerdp 3.31.0
published: '2026-09-03'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T19:22:08.110'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85090'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/FreeRDP/FreeRDP/blob/3.30.0/libfreerdp/primitives/prim_YUV.c
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/FreeRDP/FreeRDP/commit/d0a481cb74ab57bca24791fe11b89464a332d3f1
    label: disclosure@vulncheck.com
  - url: 'https://github.com/FreeRDP/FreeRDP/releases/tag/3.31.0'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-57h7-vw2f-2f9x'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-before-3.31.0-heap-out-of-bounds-read-via-avc444
    label: disclosure@vulncheck.com
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-57h7-vw2f-2f9x'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.0043
epssPercentile: 0.34609
ingestedAt: '2026-09-05T20:44:35.881Z'
---

## Overview

FreeRDP before 3.31.0 contains a heap out-of-bounds read vulnerability in the general_ChromaV1ToYUV444 function during AVC444 chroma plane reconstruction. A malicious RDP server can craft a RFX_AVC444_BITMAP_STREAM with specific frame geometry to trigger an out-of-bounds memory read past the allocated luma plane.

## Affected

- `freerdp < 3.31.0`

## Remediation

Upgrade past the affected range:

- `freerdp 3.31.0`