# CVE-2026-109240: freerdp3-shadow-x11: FreeRDP 3.11.0 before 3.32.1 contains a reachable assertion vulnerability in urb_isoch_transfer that allows malicious...

CVE-2026-109240 is fixed in 34 products on 1 platform, first by DEBIAN-CVE-2026-109240, released October 12, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-109240
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 12, 2026

## Description

FreeRDP 3.11.0 before 3.32.1 contains a reachable assertion vulnerability in urb_isoch_transfer that allows malicious RDP servers to crash clients by sending unvalidated OutputBufferSize values. Attackers can send a TS_URB_ISOCH_TRANSFER IN-direction request with OutputBufferSize above INT32_MAX over URBDRC, triggering an assertion in libusb_udev_isoch_transfer that terminates the client.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | freerdp amzn 2023 | 2:3.32.1-1.amzn2023.0.1 | [ALAS2023-2026-3307](https://patchblox.com/security/data/fix/linux/alas2023-2026-3307.md) | Nov 7, 2026 |
| Linux | freerdp-debuginfo amzn 2023 | 2:3.32.1-1.amzn2023.0.1 | [ALAS2023-2026-3307](https://patchblox.com/security/data/fix/linux/alas2023-2026-3307.md) | Nov 7, 2026 |
| Linux | freerdp-debugsource amzn 2023 | 2:3.32.1-1.amzn2023.0.1 | [ALAS2023-2026-3307](https://patchblox.com/security/data/fix/linux/alas2023-2026-3307.md) | Nov 7, 2026 |
| Linux | freerdp-devel amzn 2023 | 2:3.32.1-1.amzn2023.0.1 | [ALAS2023-2026-3307](https://patchblox.com/security/data/fix/linux/alas2023-2026-3307.md) | Nov 7, 2026 |
| Linux | freerdp-libs amzn 2023 | 2:3.32.1-1.amzn2023.0.1 | [ALAS2023-2026-3307](https://patchblox.com/security/data/fix/linux/alas2023-2026-3307.md) | Nov 7, 2026 |
| Linux | freerdp-libs-debuginfo amzn 2023 | 2:3.32.1-1.amzn2023.0.1 | [ALAS2023-2026-3307](https://patchblox.com/security/data/fix/linux/alas2023-2026-3307.md) | Nov 7, 2026 |
| Linux | freerdp-proxy Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp-proxy 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-proxy-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | freerdp-proxy-modules Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp-proxy-modules 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-proxy-modules-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | freerdp-sdl Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp-sdl 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-sdl-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | freerdp-server amzn 2023 | 2:3.32.1-1.amzn2023.0.1 | [ALAS2023-2026-3307](https://patchblox.com/security/data/fix/linux/alas2023-2026-3307.md) | Nov 7, 2026 |
| Linux | freerdp-server-debuginfo amzn 2023 | 2:3.32.1-1.amzn2023.0.1 | [ALAS2023-2026-3307](https://patchblox.com/security/data/fix/linux/alas2023-2026-3307.md) | Nov 7, 2026 |
| Linux | freerdp-shadow-x11 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp-shadow-x11 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-shadow-x11-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | freerdp-wayland Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp-wayland 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-wayland-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | freerdp-x11 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp-x11 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp-x11-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | freerdp3 Debian 14 | 3.32.1+dfsg-1 | [DEBIAN-CVE-2026-109240](https://patchblox.com/security/data/fix/linux/debian-cve-2026-109240.md) | Oct 12, 2026 |
| Linux | freerdp3-proxy Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp3-proxy 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-proxy-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | freerdp3-proxy-modules Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp3-proxy-modules 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-proxy-modules-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | freerdp3-sdl Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp3-sdl 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-sdl-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | freerdp3-shadow-x11 Ubuntu 24.04.5 LTS (noble) | 3.32.1+dfsg-0ubuntu0.24.04.1 | [freerdp3-shadow-x11 3.32.1+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-shadow-x11-3.32.1-dfsg-0ubuntu0.24.04.1.md) | Oct 19, 2026 |
| Linux | freerdp3-shadow-x11 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp3-shadow-x11 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-shadow-x11-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | freerdp3-wayland Ubuntu 24.04.5 LTS (noble) | 3.32.1+dfsg-0ubuntu0.24.04.1 | [freerdp3-wayland 3.32.1+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-wayland-3.32.1-dfsg-0ubuntu0.24.04.1.md) | Oct 19, 2026 |
| Linux | freerdp3-wayland Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp3-wayland 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-wayland-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | freerdp3-x11 Ubuntu 24.04.5 LTS (noble) | 3.32.1+dfsg-0ubuntu0.24.04.1 | [freerdp3-x11 3.32.1+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-x11-3.32.1-dfsg-0ubuntu0.24.04.1.md) | Oct 19, 2026 |
| Linux | freerdp3-x11 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [freerdp3-x11 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-freerdp3-x11-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | libfreerdp-client3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.1+dfsg-0ubuntu0.24.04.1 | [libfreerdp-client3-3 3.32.1+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-client3-3-3.32.1-dfsg-0ubuntu0.24.04.1.md) | Oct 19, 2026 |
| Linux | libfreerdp-client3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [libfreerdp-client3-3 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-client3-3-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | libfreerdp-server-proxy3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [libfreerdp-server-proxy3-3 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-server-proxy3-3-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | libfreerdp-server3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.1+dfsg-0ubuntu0.24.04.1 | [libfreerdp-server3-3 3.32.1+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-server3-3-3.32.1-dfsg-0ubuntu0.24.04.1.md) | Oct 19, 2026 |
| Linux | libfreerdp-server3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [libfreerdp-server3-3 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-server3-3-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | libfreerdp-shadow-subsystem3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.1+dfsg-0ubuntu0.24.04.1 | [libfreerdp-shadow-subsystem3-3 3.32.1+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-shadow-subsystem3-3-3.32.1-dfsg-0ubuntu0.24.04.1.md) | Oct 19, 2026 |
| Linux | libfreerdp-shadow-subsystem3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [libfreerdp-shadow-subsystem3-3 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-shadow-subsystem3-3-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | libfreerdp-shadow3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.1+dfsg-0ubuntu0.24.04.1 | [libfreerdp-shadow3-3 3.32.1+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-shadow3-3-3.32.1-dfsg-0ubuntu0.24.04.1.md) | Oct 19, 2026 |
| Linux | libfreerdp-shadow3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [libfreerdp-shadow3-3 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp-shadow3-3-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | libfreerdp3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.1+dfsg-0ubuntu0.24.04.1 | [libfreerdp3-3 3.32.1+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp3-3-3.32.1-dfsg-0ubuntu0.24.04.1.md) | Oct 19, 2026 |
| Linux | libfreerdp3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [libfreerdp3-3 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libfreerdp3-3-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | libwinpr amzn 2023 | 2:3.32.1-1.amzn2023.0.1 | [ALAS2023-2026-3307](https://patchblox.com/security/data/fix/linux/alas2023-2026-3307.md) | Nov 7, 2026 |
| Linux | libwinpr-debuginfo amzn 2023 | 2:3.32.1-1.amzn2023.0.1 | [ALAS2023-2026-3307](https://patchblox.com/security/data/fix/linux/alas2023-2026-3307.md) | Nov 7, 2026 |
| Linux | libwinpr-devel amzn 2023 | 2:3.32.1-1.amzn2023.0.1 | [ALAS2023-2026-3307](https://patchblox.com/security/data/fix/linux/alas2023-2026-3307.md) | Nov 7, 2026 |
| Linux | libwinpr-tools3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.1+dfsg-0ubuntu0.24.04.1 | [libwinpr-tools3-3 3.32.1+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwinpr-tools3-3-3.32.1-dfsg-0ubuntu0.24.04.1.md) | Oct 19, 2026 |
| Linux | libwinpr-tools3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [libwinpr-tools3-3 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libwinpr-tools3-3-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | libwinpr3-3 Ubuntu 24.04.5 LTS (noble) | 3.32.1+dfsg-0ubuntu0.24.04.1 | [libwinpr3-3 3.32.1+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwinpr3-3-3.32.1-dfsg-0ubuntu0.24.04.1.md) | Oct 19, 2026 |
| Linux | libwinpr3-3 Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [libwinpr3-3 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libwinpr3-3-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | winpr-utils Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [winpr-utils 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-winpr-utils-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |
| Linux | winpr3-utils Ubuntu 24.04.5 LTS (noble) | 3.32.1+dfsg-0ubuntu0.24.04.1 | [winpr3-utils 3.32.1+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-winpr3-utils-3.32.1-dfsg-0ubuntu0.24.04.1.md) | Oct 19, 2026 |
| Linux | winpr3-utils Ubuntu 26.04.1 LTS (resolute) | 3.32.1+dfsg-0ubuntu0.26.04.1 | [winpr3-utils 3.32.1+dfsg-0ubuntu0.26.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-winpr3-utils-3.32.1-dfsg-0ubuntu0.26.04.1.md) | Nov 7, 2026 |

---

Data as of 2026-11-09T07:25:28Z 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.