---
id: CVE-2026-55648
title: FreeRDP is a free implementation of the Remote Desktop Protocol
summary: >-
  FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to
  3.27.0, freerdp_image_copy_from_icon_data in libfreerdp/codec/color.c
  calculates nWidth multiplied by nHeight multiplied by
  FreeRDPGetBytesPerPixel(format) in 32-b…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-190
  - CWE-125
vendor: freerdp
product: freerdp
affected:
  - freerdp < 3.27.0
patched:
  - freerdp 3.27.0
published: '2026-08-19'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T15:14:57.957'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55648'
references:
  - url: >-
      https://github.com/FreeRDP/FreeRDP/commit/e4ae473da2926724d9b6329778797a3bdea79eb3
    label: security-advisories@github.com
  - url: 'https://github.com/FreeRDP/FreeRDP/pull/12877'
    label: security-advisories@github.com
  - url: 'https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0'
    label: security-advisories@github.com
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5c5v-f78v-h2f6'
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55648.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-55648'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2519816'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-55648'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55648'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00554
epssPercentile: 0.43823
ingestedAt: '2026-08-22T21:37:49.983Z'
scores:
  nvd: 7.5
  vendor: 4.3
---

## Overview

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, freerdp_image_copy_from_icon_data in libfreerdp/codec/color.c calculates nWidth multiplied by nHeight multiplied by FreeRDPGetBytesPerPixel(format) in 32-bit arithmetic. A malicious RDP server can send a RAIL TS_ICON_INFO update with dimensions such as 32768 by 32768 and 32 bits per pixel so the required-size calculation wraps, bypassing the cbBitsColor source bounds check before freerdp_image_copy_no_overlap reads attacker-controlled icon data. This affects RemoteApp clients using the vulnerable library path, while xfreerdp has a caller-side mitigation. This issue is fixed in version 3.27.0.

## Affected

- `freerdp < 3.27.0`

## Remediation

Upgrade past the affected range:

- `freerdp 3.27.0`

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55648.json)