CVE-2026-91948
freerdp3: FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in server-side static virtual channel han...
CVE-2026-91948 is fixed in 23 products on 1 platform, first by freerdp3-shadow-x11 3.31.0+dfsg-0ubuntu0.24.04.1, released September 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
n/a
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0059
48th percentile
FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in server-side static virtual channel handling when CHANNEL_OPTION_SHOW_PROTOCOL is enabled. Authenticated clients can queue oversized channel messages that cause buffer underflow and corrupt heap memory including live pointers, potentially enabling code execution.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| freerdp-proxy · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-proxy 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp-proxy-modules · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-proxy-modules 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp-sdl · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-sdl 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp-shadow-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-shadow-x11 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp-wayland · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-wayland 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp-x11 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3 · Debian 14 | 3.31.0+dfsg-1 | DEBIAN-CVE-2026-91948 | Sep 17, 2026 |
| freerdp3-proxy · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-proxy 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3-proxy-modules · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-proxy-modules 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3-sdl · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-sdl 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3-shadow-x11 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | freerdp3-shadow-x11 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| freerdp3-shadow-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-shadow-x11 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3-wayland · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | freerdp3-wayland 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| freerdp3-wayland · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-wayland 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| freerdp3-x11 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | freerdp3-x11 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| freerdp3-x11 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | freerdp3-x11 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp-client3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-client3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libfreerdp-client3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-client3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp-server-proxy3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-server-proxy3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp-server3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-server3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libfreerdp-server3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-server3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp-shadow-subsystem3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-shadow-subsystem3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libfreerdp-shadow-subsystem3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-shadow-subsystem3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp-shadow3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-shadow3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libfreerdp-shadow3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp-shadow3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libfreerdp3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libfreerdp3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libfreerdp3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libfreerdp3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libwinpr-tools3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libwinpr-tools3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libwinpr-tools3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libwinpr-tools3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| libwinpr3-3 · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | libwinpr3-3 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| libwinpr3-3 · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | libwinpr3-3 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| winpr-utils · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | winpr-utils 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
| winpr3-utils · Ubuntu 24.04.5 LTS (noble) | 3.31.0+dfsg-0ubuntu0.24.04.1 | winpr3-utils 3.31.0+dfsg-0ubuntu0.24.04.1 | Sep 14, 2026 |
| winpr3-utils · Ubuntu 26.04.1 LTS (resolute) | 3.31.0+dfsg-0ubuntu0.26.04.1 | winpr3-utils 3.31.0+dfsg-0ubuntu0.26.04.1 | Sep 15, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
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.