# CVE-2026-22853: freerdp: FreeRDP is a free implementation of the Remote Desktop Protocol

CVE-2026-22853 is fixed in 22 products on 1 platform, first by DEBIAN-CVE-2026-22853, released January 14, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-22853
- Priority: High
- CVSS: 9.8 (important)
- EPSS: 0.0078
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 14, 2026

## Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, RDPEAR’s NDR array reader does not perform bounds checking on the on‑wire element count and can write past the heap buffer allocated from hints, causing a heap buffer overflow in ndr_read_uint8Array. This vulnerability is fixed in 3.20.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | freerdp RHEL 10 | 3.10.3-3.el10_0.2 | [RHSA-2026:4121](https://patchblox.com/security/data/fix/linux/rhsa-2026-4121.md) | Feb 9, 2026 |
| Linux | freerdp almalinux 10 | 2:3.10.3-5.el10_1.2 | [ALSA-2026:3068](https://patchblox.com/security/data/fix/linux/alsa-2026-3068.md) | Feb 23, 2026 |
| Linux | freerdp ol 10 | 2:3.10.3-5.el10_1.2 | [ELSA-2026-3068](https://patchblox.com/security/data/fix/linux/elsa-2026-3068.md) | Feb 23, 2026 |
| Linux | freerdp opensuse-leap 16.0 | 3.22.0-160000.1.1 | [OPENSUSE-SU-2026:20339-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20339-1.md) | Mar 10, 2026 |
| Linux | freerdp rocky 10 | 2:3.10.3-5.el10_1.2 | [RLSA-2026:3068](https://patchblox.com/security/data/fix/linux/rlsa-2026-3068.md) | Feb 24, 2026 |
| Linux | freerdp sles 15.7 | 3.10.3-150700.3.3.1 | [SUSE-SU-2026:0345-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0345-1.md) | Jan 30, 2026 |
| Linux | freerdp-devel almalinux 10 | 2:3.10.3-5.el10_1.2 | [ALSA-2026:3068](https://patchblox.com/security/data/fix/linux/alsa-2026-3068.md) | Feb 23, 2026 |
| Linux | freerdp-devel ol 10 | 2:3.10.3-5.el10_1.2 | [ELSA-2026-3068](https://patchblox.com/security/data/fix/linux/elsa-2026-3068.md) | Feb 23, 2026 |
| Linux | freerdp-libs almalinux 10 | 2:3.10.3-5.el10_1.2 | [ALSA-2026:3068](https://patchblox.com/security/data/fix/linux/alsa-2026-3068.md) | Feb 23, 2026 |
| Linux | freerdp-libs ol 10 | 2:3.10.3-5.el10_1.2 | [ELSA-2026-3068](https://patchblox.com/security/data/fix/linux/elsa-2026-3068.md) | Feb 23, 2026 |
| Linux | freerdp-server almalinux 10 | 2:3.10.3-5.el10_1.2 | [ALSA-2026:3068](https://patchblox.com/security/data/fix/linux/alsa-2026-3068.md) | Feb 23, 2026 |
| Linux | freerdp-server ol 10 | 2:3.10.3-5.el10_1.2 | [ELSA-2026-3068](https://patchblox.com/security/data/fix/linux/elsa-2026-3068.md) | Feb 23, 2026 |
| Linux | freerdp3 Debian 13.5 (trixie) | 3.15.0+dfsg-2.1+deb13u1 | [DEBIAN-CVE-2026-22853](https://patchblox.com/security/data/fix/linux/debian-cve-2026-22853.md) | Jan 14, 2026 |
| Linux | freerdp3 Debian 14 | 3.20.2+dfsg-1 | [DEBIAN-CVE-2026-22853](https://patchblox.com/security/data/fix/linux/debian-cve-2026-22853.md) | Jan 14, 2026 |
| Linux | freerdp3-proxy Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [freerdp3-proxy 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-freerdp3-proxy-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | freerdp3-proxy-modules Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [freerdp3-proxy-modules 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-freerdp3-proxy-modules-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | freerdp3-sdl Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [freerdp3-sdl 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-freerdp3-sdl-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | freerdp3-shadow-x11 Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [freerdp3-shadow-x11 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-freerdp3-shadow-x11-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | freerdp3-wayland Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [freerdp3-wayland 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-freerdp3-wayland-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | freerdp3-x11 Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [freerdp3-x11 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-freerdp3-x11-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | libfreerdp-client3-3 Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [libfreerdp-client3-3 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libfreerdp-client3-3-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | libfreerdp-server-proxy3-3 Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [libfreerdp-server-proxy3-3 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libfreerdp-server-proxy3-3-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | libfreerdp-server3-3 Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [libfreerdp-server3-3 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libfreerdp-server3-3-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | libfreerdp-shadow-subsystem3-3 Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [libfreerdp-shadow-subsystem3-3 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libfreerdp-shadow-subsystem3-3-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | libfreerdp-shadow3-3 Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [libfreerdp-shadow3-3 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libfreerdp-shadow3-3-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | libfreerdp3-3 Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [libfreerdp3-3 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libfreerdp3-3-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | libwinpr almalinux 10 | 2:3.10.3-5.el10_1.2 | [ALSA-2026:3068](https://patchblox.com/security/data/fix/linux/alsa-2026-3068.md) | Feb 23, 2026 |
| Linux | libwinpr ol 10 | 2:3.10.3-5.el10_1.2 | [ELSA-2026-3068](https://patchblox.com/security/data/fix/linux/elsa-2026-3068.md) | Feb 23, 2026 |
| Linux | libwinpr-devel almalinux 10 | 2:3.10.3-5.el10_1.2 | [ALSA-2026:3068](https://patchblox.com/security/data/fix/linux/alsa-2026-3068.md) | Feb 23, 2026 |
| Linux | libwinpr-devel ol 10 | 2:3.10.3-5.el10_1.2 | [ELSA-2026-3068](https://patchblox.com/security/data/fix/linux/elsa-2026-3068.md) | Feb 23, 2026 |
| Linux | libwinpr-tools3-3 Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [libwinpr-tools3-3 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libwinpr-tools3-3-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | libwinpr3-3 Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [libwinpr3-3 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libwinpr3-3-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |
| Linux | winpr3-utils Ubuntu 25.10 (questing) | 3.16.0+dfsg-2ubuntu0.3 | [winpr3-utils 3.16.0+dfsg-2ubuntu0.3](https://patchblox.com/security/data/fix/linux/ubuntu-questing-winpr3-utils-3.16.0-dfsg-2ubuntu0.3.md) | Feb 25, 2026 |

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Data as of 2026-11-08T13:06:02Z 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

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