---
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
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-21T14:39:55.345448Z'
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T15:51:03.137Z'
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
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-114045.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-114045'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2557974'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-114045'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-114045'
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00576
epssPercentile: 0.47285
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.

## Vendor advisories

- **Red Hat VEX** · Important · 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 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-114045.json)