---
id: CVE-2026-121395
title: FreeRDP 3.17.0 before 3.32.2 Denial of Service via RemoteFX Decoder
summary: >-
  FreeRDP from 3.17.0 before 3.32.2 contains an assertion failure in the
  RemoteFX differential decoder when verbose WinPR assertions are enabled. A
  malicious RDP server can send a crafted RemoteFX tile with adjacent LL3
  coefficients summin…
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'
cvssSource: cna
cwe:
  - CWE-617
vendor: FreeRDP
product: FreeRDP
affected:
  - FreeRDP >= 3.17.0 < 3.32.2
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T14:27:59.844Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121395'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cg4f-57hc-v7w7'
    label: GitHub Security Advisory (GHSA-cg4f-57hc-v7w7)
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-3.17.0-before-3.32.2-denial-of-service-via-remotefx-decoder
    label: >-
      VulnCheck Advisory: FreeRDP 3.17.0 before 3.32.2 Denial of Service via
      RemoteFX Decoder
tags:
  - cve.org
epss: 0.00254
epssPercentile: 0.17088
ingestedAt: '2026-11-05T19:30:42.961Z'
---

## Overview

FreeRDP from 3.17.0 before 3.32.2 contains an assertion failure in the RemoteFX differential decoder when verbose WinPR assertions are enabled. A malicious RDP server can send a crafted RemoteFX tile with adjacent LL3 coefficients summing beyond signed 16-bit range to abort the client process.

## Affected

- `FreeRDP >= 3.17.0 < 3.32.2`

## Remediation

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