---
id: "CVE-2026-121387"
kind: "vulnerability"
aliases: ["CVE-2026-121387"]
title: "FreeRDP: truncated GSM610 audio frame lets a malicious server crash the client"
severity: "medium"
cvss: 5.3
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["freerdp", "package", "rdp-client", "remote-desktop"]
not_affected_if: ["fixed-version", "trusted-servers-only"]
published_at: "2026-11-03T15:17:25+00:00"
first_seen_at: "2026-11-03T15:21:56+00:00"
updated_at: "2026-11-03T15:24:38+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121387", "first_seen_at": "2026-11-03T15:21:56+00:00"}]
---

# FreeRDP: truncated GSM610 audio frame lets a malicious server crash the client

FreeRDP versions from 2.0.0 before 3.32.2 read past the end of an audio buffer when decoding GSM610 sound from an RDP server. A malicious server can send a short WAVE2 message to crash the client.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the FreeRDP version on the client machine with `xfreerdp --version` or the packaged version in your package manager
- Look for GSM610 being negotiated on the rdpsnd audio channel in client configuration (unknown if the sources give a setting name)

## Fix

- FreeRDP: move to `3.32.2` or later

## Timeline

- 2026-11-03T15:21:56+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121387

## Documents

- [advisory] Vendor advisory: github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-wg7g-gx9g-r96c
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/freerdp-2.0.0-before-3.32.2-out-of-bounds-read-via-gsm610-wav49-decoder

## From the sources

FreeRDP 2.0.0 before 3.32.2 contains an out-of-bounds read vulnerability in freerdp_dsp_decode_gsm610 that allows malicious RDP servers to read past audio buffers by sending truncated GSM610 frames. Attackers can negotiate GSM610 on rdpsnd and send a WAVE2 message shorter than a 33- or 32-byte WAV49 frame to crash the client.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_