Use-after-free in FreeRDP - CVE-2026-25953

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU125349

Use-after-free in FreeRDP - CVE-2026-25953

Published: April 8, 2026


Vulnerability identifier: #VU125349
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-25953
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service and potentially execute arbitrary code.

The vulnerability exists due to use-after-free in xf_AppUpdateWindowFromSurface and xf_rail_paint_surface when processing concurrent RDPGFX frame updates and fastpath window-delete orders. A remote attacker can send crafted RDPGFX PDUs and window-delete orders to cause a denial of service and potentially execute arbitrary code.

Exploitation requires a malicious RDP server to win a race between the DVC thread handling EndFrame updates and the main thread deleting the mapped window.


Affected software

FreeRDP
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Package Hub 15
openSUSE Leap
openEuler
Ubuntu
Fedora
winpr2-devel
freerdp-devel
libwinpr2-debuginfo
freerdp-server-debuginfo
libuwac0-0
freerdp
libwinpr2
freerdp-wayland-debuginfo
libfreerdp2
freerdp-proxy-debuginfo
libuwac0-0-debuginfo
freerdp-wayland
freerdp-debugsource
uwac0-0-devel
freerdp-server
libfreerdp2-debuginfo
freerdp-proxy
freerdp-debuginfo
libwinpr2-2
libfreerdp2-2
libwinpr2-2-debuginfo
winpr-devel
libfreerdp2-2-debuginfo
freerdp2
freerdp2-debugsource
freerdp2-debuginfo
freerdp2-proxy-debuginfo
freerdp2-server
freerdp2-server-debuginfo
freerdp2-devel
freerdp2-proxy
freerdp-help
libwinpr
libwinpr-devel
freerdp3 (Ubuntu package)
libfreerdp3-3-debuginfo
libwinpr3-3
freerdp-sdl
librdtk0-0-debuginfo
freerdp-proxy-plugins-debuginfo
libwinpr3-3-debuginfo
libfreerdp-server-proxy3-3-debuginfo
libfreerdp-server-proxy3-3
freerdp-proxy-plugins
freerdp-sdl-debuginfo
librdtk0-0
libfreerdp3-3

How to mitigate CVE-2026-25953

Install security update from vendor's website.

FreeRDP - update to 3.23.0
winpr2-devel - addressed in versions 2.1.2-12.68.1, 2.4.0-150400.3.52.1, 2.11.7-150700.3.22.1
freerdp-devel - addressed in versions 2.1.2-12.68.1, 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
libwinpr2-debuginfo - update to 2.4.0-150400.3.52.1
freerdp-server-debuginfo - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
libuwac0-0 - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
freerdp - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
libwinpr2 - update to 2.4.0-150400.3.52.1
freerdp-wayland-debuginfo - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
libfreerdp2 - update to 2.4.0-150400.3.52.1
freerdp-proxy-debuginfo - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
libuwac0-0-debuginfo - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
freerdp-wayland - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
freerdp-debugsource - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
uwac0-0-devel - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1
freerdp-server - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
libfreerdp2-debuginfo - update to 2.4.0-150400.3.52.1
freerdp-proxy - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
freerdp-debuginfo - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
libwinpr2-2 - addressed in versions 2.11.2-150600.4.26.1, 2.11.7-150700.3.22.1
libfreerdp2-2 - addressed in versions 2.11.2-150600.4.26.1, 2.11.7-150700.3.22.1
libwinpr2-2-debuginfo - addressed in versions 2.11.2-150600.4.26.1, 2.11.7-150700.3.22.1
winpr-devel - addressed in versions 2.11.2-150600.4.26.1, 3.10.3-150700.3.14.1
libfreerdp2-2-debuginfo - addressed in versions 2.11.2-150600.4.26.1, 2.11.7-150700.3.22.1
freerdp2 - update to 2.11.7-150700.3.22.1
freerdp2-debugsource - update to 2.11.7-150700.3.22.1
freerdp2-debuginfo - update to 2.11.7-150700.3.22.1
freerdp2-proxy-debuginfo - update to 2.11.7-150700.3.22.1
freerdp2-server - update to 2.11.7-150700.3.22.1
freerdp2-server-debuginfo - update to 2.11.7-150700.3.22.1
freerdp2-devel - update to 2.11.7-150700.3.22.1
freerdp2-proxy - update to 2.11.7-150700.3.22.1
freerdp-help - update to 2.11.8-5
freerdp-devel - update to 2.11.8-5
libwinpr - update to 2.11.8-5
freerdp-debugsource - update to 2.11.8-5
freerdp-debuginfo - update to 2.11.8-5
freerdp - update to 2.11.8-5
libwinpr-devel - update to 2.11.8-5
freerdp3 (Ubuntu package) - addressed in versions 3.5.1+dfsg1-0ubuntu1.4, 3.16.0+dfsg-2ubuntu0.3
libfreerdp3-3-debuginfo - update to 3.10.3-150700.3.14.1
libwinpr3-3 - update to 3.10.3-150700.3.14.1
freerdp-sdl - update to 3.10.3-150700.3.14.1
librdtk0-0-debuginfo - update to 3.10.3-150700.3.14.1
freerdp-proxy-plugins-debuginfo - update to 3.10.3-150700.3.14.1
libwinpr3-3-debuginfo - update to 3.10.3-150700.3.14.1
libfreerdp-server-proxy3-3-debuginfo - update to 3.10.3-150700.3.14.1
libfreerdp-server-proxy3-3 - update to 3.10.3-150700.3.14.1
freerdp-proxy-plugins - update to 3.10.3-150700.3.14.1
freerdp-sdl-debuginfo - update to 3.10.3-150700.3.14.1
librdtk0-0 - update to 3.10.3-150700.3.14.1
libfreerdp3-3 - update to 3.10.3-150700.3.14.1
freerdp - addressed in versions 3.23.0-1.fc42, 3.23.0-1.fc43, 3.23.0-1.fc44

External References

Related Security Bulletins