# CVE-2026-121405: freerdp3: FreeRDP before 3.32.2 fails to cap the OutputBufferLength in serial device-control IRP requests, allowing malicious s...

CVE-2026-121405 is fixed in 23 products on 1 platform, first by DEBIAN-CVE-2026-121405, released November 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-121405
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0029
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 3, 2026

## Description

FreeRDP before 3.32.2 fails to cap the OutputBufferLength in serial device-control IRP requests, allowing malicious servers to trigger excessive memory allocation. Attackers running a server with serial redirection can send an IRP_MJ_DEVICE_CONTROL request with IOCTL_USBPRINT_GET_1284_ID and a near-maximum length to exhaust client memory.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | freerdp-proxy Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp-proxy 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-proxy-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | freerdp-proxy-modules Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp-proxy-modules 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-proxy-modules-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | freerdp-sdl Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp-sdl 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-sdl-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | freerdp-shadow-x11 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp-shadow-x11 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-shadow-x11-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | freerdp-wayland Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp-wayland 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-wayland-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | freerdp-x11 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp-x11 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-x11-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | freerdp3 Debian 14 | 3.32.2+dfsg-1 | [DEBIAN-CVE-2026-121405](https://patchblox.com/security/data/fix/linux/debian-cve-2026-121405.md) | Nov 4, 2026 |
| Linux | freerdp3-proxy Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp3-proxy 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-proxy-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | freerdp3-proxy-modules Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp3-proxy-modules 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-proxy-modules-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | freerdp3-sdl Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp3-sdl 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-sdl-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | freerdp3-shadow-x11 Ubuntu 24.04.5 LTS (noble) | 3.32.2+dfsg-0ubuntu0.24.04.1 | [freerdp3-shadow-x11 3.32.2+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-shadow-x11-3.32.2-dfsg-0ubuntu0.24.04.1.md) | Nov 11, 2026 |
| Linux | freerdp3-shadow-x11 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp3-shadow-x11 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-shadow-x11-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | freerdp3-wayland Ubuntu 24.04.5 LTS (noble) | 3.32.2+dfsg-0ubuntu0.24.04.1 | [freerdp3-wayland 3.32.2+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-wayland-3.32.2-dfsg-0ubuntu0.24.04.1.md) | Nov 11, 2026 |
| Linux | freerdp3-wayland Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp3-wayland 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-wayland-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | freerdp3-x11 Ubuntu 24.04.5 LTS (noble) | 3.32.2+dfsg-0ubuntu0.24.04.1 | [freerdp3-x11 3.32.2+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-x11-3.32.2-dfsg-0ubuntu0.24.04.1.md) | Nov 11, 2026 |
| Linux | freerdp3-x11 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [freerdp3-x11 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-x11-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | libfreerdp-client3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.2+dfsg-0ubuntu0.24.04.1 | [libfreerdp-client3-3 3.32.2+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-client3-3-3.32.2-dfsg-0ubuntu0.24.04.1.md) | Nov 11, 2026 |
| Linux | libfreerdp-client3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [libfreerdp-client3-3 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-client3-3-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | libfreerdp-server-proxy3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [libfreerdp-server-proxy3-3 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-server-proxy3-3-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | libfreerdp-server3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.2+dfsg-0ubuntu0.24.04.1 | [libfreerdp-server3-3 3.32.2+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-server3-3-3.32.2-dfsg-0ubuntu0.24.04.1.md) | Nov 11, 2026 |
| Linux | libfreerdp-server3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [libfreerdp-server3-3 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-server3-3-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | libfreerdp-shadow-subsystem3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.2+dfsg-0ubuntu0.24.04.1 | [libfreerdp-shadow-subsystem3-3 3.32.2+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-shadow-subsystem3-3-3.32.2-dfsg-0ubuntu0.24.04.1.md) | Nov 11, 2026 |
| Linux | libfreerdp-shadow-subsystem3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [libfreerdp-shadow-subsystem3-3 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-shadow-subsystem3-3-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | libfreerdp-shadow3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.2+dfsg-0ubuntu0.24.04.1 | [libfreerdp-shadow3-3 3.32.2+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-shadow3-3-3.32.2-dfsg-0ubuntu0.24.04.1.md) | Nov 11, 2026 |
| Linux | libfreerdp-shadow3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [libfreerdp-shadow3-3 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-shadow3-3-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | libfreerdp3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.2+dfsg-0ubuntu0.24.04.1 | [libfreerdp3-3 3.32.2+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp3-3-3.32.2-dfsg-0ubuntu0.24.04.1.md) | Nov 11, 2026 |
| Linux | libfreerdp3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [libfreerdp3-3 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp3-3-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | libwinpr-tools3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.2+dfsg-0ubuntu0.24.04.1 | [libwinpr-tools3-3 3.32.2+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwinpr-tools3-3-3.32.2-dfsg-0ubuntu0.24.04.1.md) | Nov 11, 2026 |
| Linux | libwinpr-tools3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [libwinpr-tools3-3 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libwinpr-tools3-3-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | libwinpr3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.2+dfsg-0ubuntu0.24.04.1 | [libwinpr3-3 3.32.2+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwinpr3-3-3.32.2-dfsg-0ubuntu0.24.04.1.md) | Nov 11, 2026 |
| Linux | libwinpr3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [libwinpr3-3 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libwinpr3-3-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | winpr-utils Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [winpr-utils 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-winpr-utils-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |
| Linux | winpr3-utils Ubuntu 24.04.5 LTS (noble) | 3.32.2+dfsg-0ubuntu0.24.04.1 | [winpr3-utils 3.32.2+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-winpr3-utils-3.32.2-dfsg-0ubuntu0.24.04.1.md) | Nov 11, 2026 |
| Linux | winpr3-utils Ubuntu 26.04.1 LTS (resolute) | 3.32.2+dfsg-0ubuntu0.26.04.1 | [winpr3-utils 3.32.2+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-winpr3-utils-3.32.2-dfsg-0ubuntu0.26.04.1.md) | Nov 11, 2026 |

---

Data as of 2026-11-11T07:45:43Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.