---
id: CVE-2026-114045
title: FreeRDP before 3.32.1 Heap Buffer Overflow via rdpsnd_server_select_format
summary: >-
  FreeRDP before 3.32.1 contains a heap-based buffer overflow in the server-side
  rdpsnd channel because an integer wraparound in rdpsnd_server_select_format()
  DVI_ADPCM block-alignment arithmetic bypasses validation. A malicious RDP
  client…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-122
vendor: FreeRDP
product: FreeRDP
affected:
  - FreeRDP < 3.32.1
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T00:36:24.094Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114045'
references:
  - url: 'https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3m9q-g533-rqjq'
    label: GitHub Security Advisory (GHSA-3m9q-g533-rqjq)
  - url: >-
      https://www.vulncheck.com/advisories/freerdp-before-3.32.1-heap-buffer-overflow-via-rdpsnd-server-select-format
    label: >-
      VulnCheck Advisory: FreeRDP before 3.32.1 Heap Buffer Overflow via
      rdpsnd_server_select_format
tags:
  - cve.org
ingestedAt: '2026-10-21T01:37:08.045Z'
---

## Overview

FreeRDP before 3.32.1 contains a heap-based buffer overflow in the server-side rdpsnd channel because an integer wraparound in rdpsnd_server_select_format() DVI_ADPCM block-alignment arithmetic bypasses validation. A malicious RDP client can send two SNDC_FORMATS PDUs with an nBlockAlign too small for nChannels, causing an unbounded heap write during server audio playback, potentially enabling code execution.

## Affected

- `FreeRDP < 3.32.1`

## Remediation

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