# CVE-2026-31806: freerdp3-shadow-x11: FreeRDP is a free implementation of the Remote Desktop Protocol

CVE-2026-31806 is fixed in 32 products on 1 platform, first by RHSA-2026:6743, released March 13, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-31806
- Priority: High
- CVSS: 9.8 (Medium)
- EPSS: 0.0075
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 13, 2026

## Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0,  the gdi_surface_bits() function processes SURFACE_BITS_COMMAND messages sent by the RDP server. When the command is handled using NSCodec, the bmp.width and bmp.height values provided by the server are not properly validated against the actual desktop dimensions. A malicious RDP server can supply crafted bmp.width and bmp.height values that exceed the expected surface size. Because these values are used during bitmap decoding and memory operations without proper bounds checking, this can lead to a heap buffer overflow. Since the attacker can also control the associated pixel data transmitted by the server, the overflow may be exploitable to overwrite adjacent heap memory. This vulnerability is fixed in 3.24.0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | freerdp RHEL 10 | 3.10.3-3.el10_0.5 | [RHSA-2026:6743](https://patchblox.com/security/data/fix/linux/rhsa-2026-6743.md) | Mar 13, 2026 |
| Linux | freerdp RHEL 8 | 2:2.11.7-6.el8_10 | [RHSA-2026:6918](https://patchblox.com/security/data/fix/linux/rhsa-2026-6918.md) | Apr 15, 2026 |
| Linux | freerdp RHEL 9 | 2:2.11.7-1.el9_7.5 | [RHSA-2026:6340](https://patchblox.com/security/data/fix/linux/rhsa-2026-6340.md) | Apr 15, 2026 |
| Linux | freerdp almalinux 10 | 2:3.10.3-5.el10_1.5 | [ALSA-2026:6799](https://patchblox.com/security/data/fix/linux/alsa-2026-6799.md) | Apr 7, 2026 |
| Linux | freerdp almalinux 8 | 2:2.11.7-6.el8_10 | [ALSA-2026:6918](https://patchblox.com/security/data/fix/linux/alsa-2026-6918.md) | Apr 7, 2026 |
| Linux | freerdp almalinux 9 | 2:2.11.7-1.el9_7.5 | [ALSA-2026:6340](https://patchblox.com/security/data/fix/linux/alsa-2026-6340.md) | Apr 1, 2026 |
| Linux | freerdp amzn 2023 | 2:3.6.3-1.amzn2023.0.7 | [ALAS2023-2026-1512](https://patchblox.com/security/data/fix/linux/alas2023-2026-1512.md) | Mar 30, 2026 |
| Linux | freerdp ol 10 | 2:3.10.3-5.el10_1.5 | [ELSA-2026-6799](https://patchblox.com/security/data/fix/linux/elsa-2026-6799.md) | Apr 7, 2026 |
| Linux | freerdp ol 8 | 2:2.11.7-6.el8_10 | [ELSA-2026-6918](https://patchblox.com/security/data/fix/linux/elsa-2026-6918.md) | Apr 7, 2026 |
| Linux | freerdp ol 9 | 2:2.11.7-1.el9_7.5 | [ELSA-2026-6340](https://patchblox.com/security/data/fix/linux/elsa-2026-6340.md) | Apr 1, 2026 |
| Linux | freerdp opensuse-leap 15.6 | 2.11.2-150600.4.18.1 | [SUSE-SU-2026:1160-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1160-1.md) | Mar 31, 2026 |
| Linux | freerdp rocky 10 | 2:3.10.3-5.el10_1.5 | [RLSA-2026:6799](https://patchblox.com/security/data/fix/linux/rlsa-2026-6799.md) | Apr 9, 2026 |
| Linux | freerdp rocky 8 | 2:2.11.7-6.el8_10 | [RLSA-2026:6918](https://patchblox.com/security/data/fix/linux/rlsa-2026-6918.md) | Apr 9, 2026 |
| Linux | freerdp rocky 9 | 2:2.11.7-1.el9_7.5 | [RLSA-2026:6340](https://patchblox.com/security/data/fix/linux/rlsa-2026-6340.md) | Apr 7, 2026 |
| Linux | freerdp sles 15.7 | 3.10.3-150700.3.9.1 | [SUSE-SU-2026:1398-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1398-1.md) | Apr 16, 2026 |
| Linux | freerdp-debuginfo amzn 2023 | 2:3.6.3-1.amzn2023.0.7 | [ALAS2023-2026-1512](https://patchblox.com/security/data/fix/linux/alas2023-2026-1512.md) | Mar 30, 2026 |
| Linux | freerdp-debugsource amzn 2023 | 2:3.6.3-1.amzn2023.0.7 | [ALAS2023-2026-1512](https://patchblox.com/security/data/fix/linux/alas2023-2026-1512.md) | Mar 30, 2026 |
| Linux | freerdp-devel RHEL 8 | 2:2.11.7-6.el8_10 | [RHSA-2026:6918](https://patchblox.com/security/data/fix/linux/rhsa-2026-6918.md) | Apr 15, 2026 |
| Linux | freerdp-devel RHEL 9 | 2:2.11.7-1.el9_7.5 | [RHSA-2026:6340](https://patchblox.com/security/data/fix/linux/rhsa-2026-6340.md) | Apr 15, 2026 |
| Linux | freerdp-devel almalinux 10 | 2:3.10.3-5.el10_1.5 | [ALSA-2026:6799](https://patchblox.com/security/data/fix/linux/alsa-2026-6799.md) | Apr 7, 2026 |
| Linux | freerdp-devel almalinux 8 | 2:2.11.7-6.el8_10 | [ALSA-2026:6918](https://patchblox.com/security/data/fix/linux/alsa-2026-6918.md) | Apr 7, 2026 |
| Linux | freerdp-devel almalinux 9 | 2:2.11.7-1.el9_7.5 | [ALSA-2026:6340](https://patchblox.com/security/data/fix/linux/alsa-2026-6340.md) | Apr 1, 2026 |
| Linux | freerdp-devel amzn 2023 | 2:3.6.3-1.amzn2023.0.7 | [ALAS2023-2026-1512](https://patchblox.com/security/data/fix/linux/alas2023-2026-1512.md) | Mar 30, 2026 |
| Linux | freerdp-devel ol 10 | 2:3.10.3-5.el10_1.5 | [ELSA-2026-6799](https://patchblox.com/security/data/fix/linux/elsa-2026-6799.md) | Apr 7, 2026 |
| Linux | freerdp-devel ol 8 | 2:2.11.7-6.el8_10 | [ELSA-2026-6918](https://patchblox.com/security/data/fix/linux/elsa-2026-6918.md) | Apr 7, 2026 |
| Linux | freerdp-devel ol 9 | 2:2.11.7-1.el9_7.5 | [ELSA-2026-6340](https://patchblox.com/security/data/fix/linux/elsa-2026-6340.md) | Apr 1, 2026 |
| Linux | freerdp-libs RHEL 8 | 2:2.11.7-6.el8_10 | [RHSA-2026:6918](https://patchblox.com/security/data/fix/linux/rhsa-2026-6918.md) | Apr 15, 2026 |
| Linux | freerdp-libs RHEL 9 | 2:2.11.7-1.el9_7.5 | [RHSA-2026:6340](https://patchblox.com/security/data/fix/linux/rhsa-2026-6340.md) | Apr 15, 2026 |
| Linux | freerdp-libs almalinux 10 | 2:3.10.3-5.el10_1.5 | [ALSA-2026:6799](https://patchblox.com/security/data/fix/linux/alsa-2026-6799.md) | Apr 7, 2026 |
| Linux | freerdp-libs almalinux 8 | 2:2.11.7-6.el8_10 | [ALSA-2026:6918](https://patchblox.com/security/data/fix/linux/alsa-2026-6918.md) | Apr 7, 2026 |
| Linux | freerdp-libs almalinux 9 | 2:2.11.7-1.el9_7.5 | [ALSA-2026:6340](https://patchblox.com/security/data/fix/linux/alsa-2026-6340.md) | Apr 1, 2026 |
| Linux | freerdp-libs amzn 2023 | 2:3.6.3-1.amzn2023.0.7 | [ALAS2023-2026-1512](https://patchblox.com/security/data/fix/linux/alas2023-2026-1512.md) | Mar 30, 2026 |
| Linux | freerdp-libs ol 10 | 2:3.10.3-5.el10_1.5 | [ELSA-2026-6799](https://patchblox.com/security/data/fix/linux/elsa-2026-6799.md) | Apr 7, 2026 |
| Linux | freerdp-libs ol 8 | 2:2.11.7-6.el8_10 | [ELSA-2026-6918](https://patchblox.com/security/data/fix/linux/elsa-2026-6918.md) | Apr 7, 2026 |
| Linux | freerdp-libs ol 9 | 2:2.11.7-1.el9_7.5 | [ELSA-2026-6340](https://patchblox.com/security/data/fix/linux/elsa-2026-6340.md) | Apr 1, 2026 |
| Linux | freerdp-libs-debuginfo amzn 2023 | 2:3.6.3-1.amzn2023.0.7 | [ALAS2023-2026-1512](https://patchblox.com/security/data/fix/linux/alas2023-2026-1512.md) | Mar 30, 2026 |
| Linux | freerdp-server almalinux 10 | 2:3.10.3-5.el10_1.5 | [ALSA-2026:6799](https://patchblox.com/security/data/fix/linux/alsa-2026-6799.md) | Apr 7, 2026 |
| Linux | freerdp-server amzn 2023 | 2:3.6.3-1.amzn2023.0.7 | [ALAS2023-2026-1512](https://patchblox.com/security/data/fix/linux/alas2023-2026-1512.md) | Mar 30, 2026 |
| Linux | freerdp-server ol 10 | 2:3.10.3-5.el10_1.5 | [ELSA-2026-6799](https://patchblox.com/security/data/fix/linux/elsa-2026-6799.md) | Apr 7, 2026 |
| Linux | freerdp-server-debuginfo amzn 2023 | 2:3.6.3-1.amzn2023.0.7 | [ALAS2023-2026-1512](https://patchblox.com/security/data/fix/linux/alas2023-2026-1512.md) | Mar 30, 2026 |
| Linux | freerdp2 Fedora 43 | 2.11.7-16.fc43 | [FEDORA-2026-3FE3E3AE10](https://patchblox.com/security/data/fix/linux/fedora-2026-3fe3e3ae10.md) | Sep 1, 2026 |
| Linux | freerdp2 sles 15.7 | 2.11.7-150700.3.14.1 | [SUSE-SU-2026:1164-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-1164-1.md) | Apr 1, 2026 |
| Linux | freerdp2-debuginfo Fedora 43 | 2.11.7-16.fc43 | [FEDORA-2026-3FE3E3AE10](https://patchblox.com/security/data/fix/linux/fedora-2026-3fe3e3ae10.md) | Sep 1, 2026 |
| Linux | freerdp2-debugsource Fedora 43 | 2.11.7-16.fc43 | [FEDORA-2026-3FE3E3AE10](https://patchblox.com/security/data/fix/linux/fedora-2026-3fe3e3ae10.md) | Sep 1, 2026 |
| Linux | freerdp2-devel Fedora 43 | 2.11.7-16.fc43 | [FEDORA-2026-3FE3E3AE10](https://patchblox.com/security/data/fix/linux/fedora-2026-3fe3e3ae10.md) | Sep 1, 2026 |
| Linux | freerdp2-libs Fedora 43 | 2.11.7-16.fc43 | [FEDORA-2026-3FE3E3AE10](https://patchblox.com/security/data/fix/linux/fedora-2026-3fe3e3ae10.md) | Sep 1, 2026 |
| Linux | freerdp2-libs-debuginfo Fedora 43 | 2.11.7-16.fc43 | [FEDORA-2026-3FE3E3AE10](https://patchblox.com/security/data/fix/linux/fedora-2026-3fe3e3ae10.md) | Sep 1, 2026 |
| Linux | freerdp3 Debian 13.5 (trixie) | 3.15.0+dfsg-2.1+deb13u2 | [DEBIAN-CVE-2026-31806](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31806.md) | Mar 13, 2026 |
| Linux | freerdp3 Debian 14 | 3.24.0+dfsg-1 | [DEBIAN-CVE-2026-31806](https://patchblox.com/security/data/fix/linux/debian-cve-2026-31806.md) | Mar 13, 2026 |
| Linux | freerdp3-shadow-x11 Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | [freerdp3-shadow-x11 3.30.0+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-shadow-x11-3.30.0-dfsg-0ubuntu0.24.04.1.md) | Jul 23, 2026 |
| Linux | freerdp3-wayland Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | [freerdp3-wayland 3.30.0+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-wayland-3.30.0-dfsg-0ubuntu0.24.04.1.md) | Jul 23, 2026 |
| Linux | freerdp3-x11 Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | [freerdp3-x11 3.30.0+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-freerdp3-x11-3.30.0-dfsg-0ubuntu0.24.04.1.md) | Jul 23, 2026 |
| Linux | libfreerdp-client3-3 Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | [libfreerdp-client3-3 3.30.0+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-client3-3-3.30.0-dfsg-0ubuntu0.24.04.1.md) | Jul 23, 2026 |
| Linux | libfreerdp-server3-3 Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | [libfreerdp-server3-3 3.30.0+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-server3-3-3.30.0-dfsg-0ubuntu0.24.04.1.md) | Jul 23, 2026 |
| Linux | libfreerdp-shadow-subsystem3-3 Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | [libfreerdp-shadow-subsystem3-3 3.30.0+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-shadow-subsystem3-3-3.30.0-dfsg-0ubuntu0.24.04.1.md) | Jul 23, 2026 |
| Linux | libfreerdp-shadow3-3 Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | [libfreerdp-shadow3-3 3.30.0+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp-shadow3-3-3.30.0-dfsg-0ubuntu0.24.04.1.md) | Jul 23, 2026 |
| Linux | libfreerdp3-3 Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | [libfreerdp3-3 3.30.0+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libfreerdp3-3-3.30.0-dfsg-0ubuntu0.24.04.1.md) | Jul 23, 2026 |
| Linux | libwinpr RHEL 8 | 2:2.11.7-6.el8_10 | [RHSA-2026:6918](https://patchblox.com/security/data/fix/linux/rhsa-2026-6918.md) | Apr 15, 2026 |
| Linux | libwinpr RHEL 9 | 2:2.11.7-1.el9_7.5 | [RHSA-2026:6340](https://patchblox.com/security/data/fix/linux/rhsa-2026-6340.md) | Apr 15, 2026 |
| Linux | libwinpr almalinux 10 | 2:3.10.3-5.el10_1.5 | [ALSA-2026:6799](https://patchblox.com/security/data/fix/linux/alsa-2026-6799.md) | Apr 7, 2026 |
| Linux | libwinpr almalinux 8 | 2:2.11.7-6.el8_10 | [ALSA-2026:6918](https://patchblox.com/security/data/fix/linux/alsa-2026-6918.md) | Apr 7, 2026 |
| Linux | libwinpr almalinux 9 | 2:2.11.7-1.el9_7.5 | [ALSA-2026:6340](https://patchblox.com/security/data/fix/linux/alsa-2026-6340.md) | Apr 1, 2026 |
| Linux | libwinpr amzn 2023 | 2:3.6.3-1.amzn2023.0.7 | [ALAS2023-2026-1512](https://patchblox.com/security/data/fix/linux/alas2023-2026-1512.md) | Mar 30, 2026 |
| Linux | libwinpr ol 10 | 2:3.10.3-5.el10_1.5 | [ELSA-2026-6799](https://patchblox.com/security/data/fix/linux/elsa-2026-6799.md) | Apr 7, 2026 |
| Linux | libwinpr ol 8 | 2:2.11.7-6.el8_10 | [ELSA-2026-6918](https://patchblox.com/security/data/fix/linux/elsa-2026-6918.md) | Apr 7, 2026 |
| Linux | libwinpr ol 9 | 2:2.11.7-1.el9_7.5 | [ELSA-2026-6340](https://patchblox.com/security/data/fix/linux/elsa-2026-6340.md) | Apr 1, 2026 |
| Linux | libwinpr-debuginfo amzn 2023 | 2:3.6.3-1.amzn2023.0.7 | [ALAS2023-2026-1512](https://patchblox.com/security/data/fix/linux/alas2023-2026-1512.md) | Mar 30, 2026 |
| Linux | libwinpr-devel RHEL 8 | 2:2.11.7-6.el8_10 | [RHSA-2026:6918](https://patchblox.com/security/data/fix/linux/rhsa-2026-6918.md) | Apr 15, 2026 |
| Linux | libwinpr-devel RHEL 9 | 2:2.11.7-1.el9_7.5 | [RHSA-2026:6340](https://patchblox.com/security/data/fix/linux/rhsa-2026-6340.md) | Apr 15, 2026 |
| Linux | libwinpr-devel almalinux 10 | 2:3.10.3-5.el10_1.5 | [ALSA-2026:6799](https://patchblox.com/security/data/fix/linux/alsa-2026-6799.md) | Apr 7, 2026 |
| Linux | libwinpr-devel almalinux 8 | 2:2.11.7-6.el8_10 | [ALSA-2026:6918](https://patchblox.com/security/data/fix/linux/alsa-2026-6918.md) | Apr 7, 2026 |
| Linux | libwinpr-devel almalinux 9 | 2:2.11.7-1.el9_7.5 | [ALSA-2026:6340](https://patchblox.com/security/data/fix/linux/alsa-2026-6340.md) | Apr 1, 2026 |
| Linux | libwinpr-devel amzn 2023 | 2:3.6.3-1.amzn2023.0.7 | [ALAS2023-2026-1512](https://patchblox.com/security/data/fix/linux/alas2023-2026-1512.md) | Mar 30, 2026 |
| Linux | libwinpr-devel ol 10 | 2:3.10.3-5.el10_1.5 | [ELSA-2026-6799](https://patchblox.com/security/data/fix/linux/elsa-2026-6799.md) | Apr 7, 2026 |
| Linux | libwinpr-devel ol 8 | 2:2.11.7-6.el8_10 | [ELSA-2026-6918](https://patchblox.com/security/data/fix/linux/elsa-2026-6918.md) | Apr 7, 2026 |
| Linux | libwinpr-devel ol 9 | 2:2.11.7-1.el9_7.5 | [ELSA-2026-6340](https://patchblox.com/security/data/fix/linux/elsa-2026-6340.md) | Apr 1, 2026 |
| Linux | libwinpr-tools3-3 Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | [libwinpr-tools3-3 3.30.0+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwinpr-tools3-3-3.30.0-dfsg-0ubuntu0.24.04.1.md) | Jul 23, 2026 |
| Linux | libwinpr2 Fedora 43 | 2.11.7-16.fc43 | [FEDORA-2026-3FE3E3AE10](https://patchblox.com/security/data/fix/linux/fedora-2026-3fe3e3ae10.md) | Sep 1, 2026 |
| Linux | libwinpr2-debuginfo Fedora 43 | 2.11.7-16.fc43 | [FEDORA-2026-3FE3E3AE10](https://patchblox.com/security/data/fix/linux/fedora-2026-3fe3e3ae10.md) | Sep 1, 2026 |
| Linux | libwinpr2-devel Fedora 43 | 2.11.7-16.fc43 | [FEDORA-2026-3FE3E3AE10](https://patchblox.com/security/data/fix/linux/fedora-2026-3fe3e3ae10.md) | Sep 1, 2026 |
| Linux | libwinpr3-3 Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | [libwinpr3-3 3.30.0+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libwinpr3-3-3.30.0-dfsg-0ubuntu0.24.04.1.md) | Jul 23, 2026 |
| Linux | winpr3-utils Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | [winpr3-utils 3.30.0+dfsg-0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-winpr3-utils-3.30.0-dfsg-0ubuntu0.24.04.1.md) | Jul 23, 2026 |

---

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