---
id: "CVE-2026-121408"
kind: "vulnerability"
aliases: ["CVE-2026-121408"]
title: "FreeRDP: USB redirection flaw lets a malicious server crash the client"
severity: "medium"
cvss: 6.0
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["freerdp", "linux", "remote-desktop", "runtime", "windows"]
not_affected_if: ["trusted-servers-only", "usb-redirection-disabled"]
published_at: "2026-11-03T15:17:29+00:00"
first_seen_at: "2026-11-03T15:21:58+00:00"
updated_at: "2026-11-03T15:23:20+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121408", "first_seen_at": "2026-11-03T15:21:58+00:00"}]
---

# FreeRDP: USB redirection flaw lets a malicious server crash the client

FreeRDP before 3.32.2 has a use-after-free in its urbdrc USB redirection channel, where a channel is freed while another thread still uses it. A malicious RDP server can trigger this during USB device announcement, crashing the client.

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

## How to check

- Check the FreeRDP version with `xfreerdp --version` or the package manager, and compare against `3.32.2`
- Confirm whether USB device redirection (urbdrc) is enabled in the client configuration: unknown

## Fix

- Move FreeRDP to `3.32.2` or later

## Timeline

- 2026-11-03T15:21:58+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121408

## Documents

- [advisory] Vendor advisory: github.com https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w897-ffhv-5j7g
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/freerdp-before-3.32.2-use-after-free-via-usb-redirection-control-channel

## From the sources

FreeRDP before 3.32.2 contains a use-after-free in the urbdrc USB redirection channel because FindChannelById returns a channel pointer without a reference and the control-channel close path does not take the device manager's loading_lock. A malicious RDP server can send a control-channel CLOSE_REQUEST while the client announces a USB device, freeing the channel before the announcement thread reads channel->Write and crashing 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_