CVE-2026-40254
freerdp3-shadow-x11: FreeRDP is a free implementation of the Remote Desktop Protocol
CVE-2026-40254 is fixed in 34 products on 1 platform, first by DEBIAN-CVE-2026-40254, released April 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
6.1
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0020
9th percentile
FreeRDP is a free implementation of the Remote Desktop Protocol. Versions prior to 3.25.0 have an off-by-one in the path traversal filter in `channels/drive/client/drive_file.c`. The `contains_dotdot()` function catches `../` and `..\` mid-path but misses `..` when it's the last component with no trailing separator. A rogue RDP server can read, list, or write files one directory above the client's shared folder through RDPDR requests. This requires the victim to connect with drive redirection enabled. Version 3.25.0 patches the issue.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| freerdp · amzn 2023 | 2:3.6.3-1.amzn2023.0.11 | ALAS2023-2026-1643 | May 11, 2026 |
| freerdp · opensuse-leap 16.0 | 3.26.0-160000.1.1 | OPENSUSE-SU-2026:21116-1 | Jun 20, 2026 |
| freerdp · sles 15.7 | 3.10.3-150700.3.17.1 | SUSE-SU-2026:3562-1 | Aug 10, 2026 |
| freerdp · sles 16.0 | 3.26.0-160000.1.1 | SUSE-SU-2026:22194-1 | Jun 20, 2026 |
| freerdp-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.11 | ALAS2023-2026-1643 | May 11, 2026 |
| freerdp-debugsource · amzn 2023 | 2:3.6.3-1.amzn2023.0.11 | ALAS2023-2026-1643 | May 11, 2026 |
| freerdp-devel · amzn 2023 | 2:3.6.3-1.amzn2023.0.11 | ALAS2023-2026-1643 | May 11, 2026 |
| freerdp-libs · amzn 2023 | 2:3.6.3-1.amzn2023.0.11 | ALAS2023-2026-1643 | May 11, 2026 |
| freerdp-libs-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.11 | ALAS2023-2026-1643 | May 11, 2026 |
| freerdp-proxy · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-proxy 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp-proxy-modules · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-proxy-modules 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp-sdl · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-sdl 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp-server · amzn 2023 | 2:3.6.3-1.amzn2023.0.11 | ALAS2023-2026-1643 | May 11, 2026 |
| freerdp-server-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.11 | ALAS2023-2026-1643 | May 11, 2026 |
| freerdp-shadow-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-shadow-x11 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp-wayland · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-wayland 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp-x11 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp3 · Debian 13.5 (trixie) | 3.15.0+dfsg-2.1+deb13u3 | DEBIAN-CVE-2026-40254 | Apr 24, 2026 |
| freerdp3 · Debian 14 | 3.25.0+dfsg-1 | DEBIAN-CVE-2026-40254 | Apr 24, 2026 |
| freerdp3-proxy · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-proxy 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp3-proxy-modules · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-proxy-modules 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| freerdp3-sdl · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-sdl 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| 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 | Jul 23, 2026 |
| freerdp3-shadow-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-shadow-x11 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| 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 | Jul 23, 2026 |
| freerdp3-wayland · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-wayland 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| 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 | Jul 23, 2026 |
| freerdp3-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | freerdp3-x11 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| 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 | Jul 23, 2026 |
| libfreerdp-client3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-client3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| libfreerdp-server-proxy3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-server-proxy3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| 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 | Jul 23, 2026 |
| libfreerdp-server3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-server3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| 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 | Jul 23, 2026 |
| libfreerdp-shadow-subsystem3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-shadow-subsystem3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| 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 | Jul 23, 2026 |
| libfreerdp-shadow3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-shadow3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| 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 | Jul 23, 2026 |
| libfreerdp3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libfreerdp3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| libwinpr · amzn 2023 | 2:3.6.3-1.amzn2023.0.11 | ALAS2023-2026-1643 | May 11, 2026 |
| libwinpr-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.11 | ALAS2023-2026-1643 | May 11, 2026 |
| libwinpr-devel · amzn 2023 | 2:3.6.3-1.amzn2023.0.11 | ALAS2023-2026-1643 | May 11, 2026 |
| 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 | Jul 23, 2026 |
| libwinpr-tools3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libwinpr-tools3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| 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 | Jul 23, 2026 |
| libwinpr3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | libwinpr3-3 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| winpr-utils · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | winpr-utils 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
| 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 | Jul 23, 2026 |
| winpr3-utils · Ubuntu 26.04.1 LTS (resolute) | 3.30.0+dfsg-0ubuntu0.26.04.1 | winpr3-utils 3.30.0+dfsg-0ubuntu0.26.04.1 | Nov 7, 2026 |
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