---
id: CVE-2026-121954
title: FreeRDP before 3.32.2 Heap Out-of-Bounds Write in Planar Codec
summary: >-
  FreeRDP before 3.32.2 has a heap out-of-bounds write in the planar codec
  because freerdp_bitmap_planar_context_reset commits new dimensions before
  buffer reallocation succeeds, and a failed ResetGraphics is only logged. A
  malicious RDP s…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-787
vendor: FreeRDP
product: FreeRDP
affected:
  - FreeRDP < 3.32.2
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-04T18:31:51.950423Z'
exploitAvailable: true
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T18:34:23.799Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121954'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-fg78-v8j5-8697'
    label: GitHub Security Advisory (GHSA-fg78-v8j5-8697)
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-before-3.32.2-heap-out-of-bounds-write-in-planar-codec
    label: >-
      VulnCheck Advisory: FreeRDP before 3.32.2 Heap Out-of-Bounds Write in
      Planar Codec
tags:
  - cve.org
  - exploit-available
ingestedAt: '2026-11-05T21:36:00.492Z'
---

## Overview

FreeRDP before 3.32.2 has a heap out-of-bounds write in the planar codec because freerdp_bitmap_planar_context_reset commits new dimensions before buffer reallocation succeeds, and a failed ResetGraphics is only logged. A malicious RDP server can send an oversized ResetGraphics PDU, then a GFX PLANAR command, to corrupt client heap memory and crash the client.

## Affected

- `FreeRDP < 3.32.2`

## Remediation

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