# CVE-2026-121408: FreeRDP use-after-free in urbdrc USB redirection

Source: https://junglewise.ai/threats/cve-2026-121408-freerdp-before-3-32-2-contains-a-use-after-free-in-the-urbdrc  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-03. Updated: 2026-11-03  
License: CC BY 4.0 with a link back

CVE-2026-121408 · Severity: medium · CVSS 5.3 · Published 2026-11-03

FreeRDP is a remote desktop client used to connect to Windows systems securely over the network. A malicious RDP server can crash a FreeRDP client by exploiting a race condition when USB device redirection is enabled, allowing an attacker to interrupt business operations. The vulnerability involves improper synchronization that allows the server to free memory while the client is still accessing it.

Technologies: [FreeRDP](https://junglewise.ai/threats/technologies/freerdp). Vendors: [FreeRDP](https://junglewise.ai/threats/vendors/freerdp).

## Quick answers

**Is CVE-2026-121408 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-121408 being exploited in the wild.

**How severe is CVE-2026-121408?** Medium severity, with a CVSS score of 5.3, published 3 November 2026.

**Which products and versions are affected?** FreeRDP before 3.32.2.

**Is there a fix for CVE-2026-121408?** Yes: fixed in 3.32.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-121408 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-121408?** Check whether you run FreeRDP at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 3.32.2

## Technical details

A use-after-free vulnerability exists in the urbdrc USB redirection control-channel handler where FindChannelById returns an unrefenced channel pointer. When a malicious RDP server sends a CLOSE_REQUEST on the control channel while a USB device announcement is in progress, the channel can be freed before the announcement thread accesses the channel's Write function pointer, resulting in a heap-use-after-free read. The race condition arises because the control-channel close path does not acquire the device manager's loading_lock held by the announcement thread.

## Affected products

- FreeRDP FreeRDP before 3.32.2

## Timeline

- 2026-10-19: advisory
- 2026-11-03: disclosed

## References

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

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- [FreeRDP heap use-after-free in brush cache](https://junglewise.ai/threats/cve-2026-125394-freerdp-before-3-33-0-contains-a-heap-use-after-free)
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- [FreeRDP heap out-of-bounds write in RDPGFX HashTable_GetKeys](https://junglewise.ai/threats/cve-2026-121958-freerdp-through-3-32-1-has-a-heap-out-of-bounds-write-in-the)