---
id: CVE-2026-109939
title: >-
  FreeRDP 3.27.1 before 3.32.0 contains a NULL pointer dereference in
  update_read_cache_bitmap_v3_order() in libfreerdp/core/orders.c, which
  accesses the client bitmap cache when the CBR3_DO_NOT_CACHE flag is set, even
  though the cache is …
summary: >-
  FreeRDP 3.27.1 before 3.32.0 contains a NULL pointer dereference in
  update_read_cache_bitmap_v3_order() in libfreerdp/core/orders.c, which
  accesses the client bitmap cache when the CBR3_DO_NOT_CACHE flag is set, even
  though the cache is …
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-476
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T17:17:32.440'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109939'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cq4m-gwc5-w8rc'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-3.27.1-before-3.32.0-null-pointer-dereference-via-cache-bitmap-v3-order
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-13T14:29:01.849Z'
---

## Overview

FreeRDP 3.27.1 before 3.32.0 contains a NULL pointer dereference in update_read_cache_bitmap_v3_order() in libfreerdp/core/orders.c, which accesses the client bitmap cache when the CBR3_DO_NOT_CACHE flag is set, even though the cache is not yet initialized before Demand Active. A malicious or compromised RDP server can send a Cache Bitmap V3 order during connection setup to crash a connecting client that has enabled the non-default Bitmap Cache V3 feature (/cache:codec:<rfx|nsc|jpeg>).

## Remediation

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