Vulnerability · Published Feb 25, 2026 · Assigned by GitHub_M
CVE-2026-27951FreeRDP has possible Integer overflow in Stream_EnsureCapacity
Medium 5.3
In plain English
A medium-severity integer overflow in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `>= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | freerdp | 2:2.11.7-9.el8_10 | ALSA-2026:16019 |
| AlmaLinux:9 | freerdp | 2:2.11.7-7.el9_8.3 | ALSA-2026:19358 |
| AlmaLinux:9 | freerdp | 2:2.11.7-1.el9_7.7 | ALSA-2026:16482 |
| AlmaLinux:8 | freerdp-devel | 2:2.11.7-9.el8_10 | ALSA-2026:16019 |
| AlmaLinux:9 | freerdp-devel | 2:2.11.7-7.el9_8.3 | ALSA-2026:19358 |
| AlmaLinux:9 | freerdp-devel | 2:2.11.7-1.el9_7.7 | ALSA-2026:16482 |
| AlmaLinux:8 | freerdp-libs | 2:2.11.7-9.el8_10 | ALSA-2026:16019 |
| AlmaLinux:9 | freerdp-libs | 2:2.11.7-7.el9_8.3 | ALSA-2026:19358 |
| AlmaLinux:9 | freerdp-libs | 2:2.11.7-1.el9_7.7 | ALSA-2026:16482 |
| AlmaLinux:8 | libwinpr | 2:2.11.7-9.el8_10 | ALSA-2026:16019 |
| AlmaLinux:9 | libwinpr | 2:2.11.7-1.el9_7.7 | ALSA-2026:16482 |
| AlmaLinux:9 | libwinpr | 2:2.11.7-7.el9_8.3 | ALSA-2026:19358 |
| AlmaLinux:8 | libwinpr-devel | 2:2.11.7-9.el8_10 | ALSA-2026:16019 |
| AlmaLinux:9 | libwinpr-devel | 2:2.11.7-7.el9_8.3 | ALSA-2026:19358 |
| AlmaLinux:9 | libwinpr-devel | 2:2.11.7-1.el9_7.7 | ALSA-2026:16482 |
| Debian:12 | freerdp2 | no fix listed | DEBIAN-CVE-2026-27951 |
| Debian:13 | freerdp3 | no fix listed | DEBIAN-CVE-2026-27951 |
| Debian:14 | freerdp3 | 3.23.0+dfsg-1 | DEBIAN-CVE-2026-27951 |
| Rocky Linux:8 | freerdp | 2:2.11.7-9.el8_10 | RLSA-2026:16019 |
| Rocky Linux:9 | freerdp | 2:2.11.7-7.el9_8.3 | RLSA-2026:19358 |
| Rocky Linux:9 | freerdp | 2:2.11.7-1.el9_7.7 | RLSA-2026:16482 |
| Ubuntu:22.04:LTS | freerdp2 | no fix listed | UBUNTU-CVE-2026-27951 |
| Ubuntu:24.04:LTS | freerdp3 | 3.30.0+dfsg-0ubuntu0.24.04.1 | USN-8561-1 |
| Ubuntu:24.04:LTS | freerdp3 | 3.5.1+dfsg1-0ubuntu1.4 | USN-8105-1 |
| Ubuntu:24.04:LTS | freerdp3 | 3.30.0+dfsg-0ubuntu0.24.04.1 | UBUNTU-CVE-2026-27951 |
| Ubuntu:25.10 | freerdp3 | no fix listed | UBUNTU-CVE-2026-27951 |
| Ubuntu:25.10 | freerdp3 | 3.16.0+dfsg-2ubuntu0.3 | USN-8105-1 |
| Ubuntu:26.04:LTS | freerdp3 | 3.30.0+dfsg-0ubuntu0.26.04.1 | USN-8561-1 |
Affected products (as reported)
Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L