CVE-2026-121408
Analyzed Analyzed - Analysis Complete

Use-After-Free in FreeRDP USB Redirection Channel

Publication date: 2026-11-03

Last updated on: 2026-11-03

Assigner: VulnCheck

Description
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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Meta Information

Published
2026-11-03
Last Modified
2026-11-03
Generated
2026-11-03
AI Q&A
2026-11-03
EPSS Evaluated
N/A
NVD
CVE-2026-121408
EUVD
EUVD-2026-115940

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
freerdp freerdp to 3.32.2 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-362 The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

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Executive Summary

FreeRDP before version 3.32.2 has a use-after-free vulnerability in the USB redirection channel. The issue occurs because the function FindChannelById returns a channel pointer without a reference, and the control-channel close path does not use the device manager's loading_lock. A malicious RDP server can exploit this by sending a control-channel CLOSE_REQUEST while a USB device is being announced, freeing the channel before the announcement thread reads channel->Write, which crashes the client.

Impact Analysis

This vulnerability could allow a malicious RDP server to crash the FreeRDP client application. If exploited, it may lead to denial-of-service conditions, disrupting remote desktop sessions and potentially causing data loss or interrupted workflows.

Mitigation Strategies

Update FreeRDP to version 3.32.2 or later to address the use-after-free vulnerability in the urbdrc USB redirection channel.

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