Reachable assertion in FreeRDP - CVE-2026-27015

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU125346

Reachable assertion in FreeRDP - CVE-2026-27015

Published: April 8, 2026


Vulnerability identifier: #VU125346
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-27015
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to reachable assertion in smartcard_unpack_read_size_align() in libfreerdp/utils/smartcard_pack.c when parsing crafted smartcard IOCTL data from an RDP server. A remote attacker can send a specially crafted SCARD_IOCTL_TRANSMIT request to cause a denial of service.

Smartcard redirection must be enabled, and user interaction is required for the client to connect to a malicious RDP server.


Affected software

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

How to mitigate CVE-2026-27015

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 - update to 2.4.0-150400.3.52.1
libfreerdp2 - update to 2.4.0-150400.3.52.1
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-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
uwac0-0-devel - addressed in versions 2.4.0-150400.3.52.1, 2.11.2-150600.4.26.1
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
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
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
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-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
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-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
libwinpr2-2 - 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 - 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
libfreerdp2-2-debuginfo - addressed in versions 2.11.2-150600.4.26.1, 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 - 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-debugsource - update to 2.11.8-1
libwinpr-devel - update to 2.11.8-1
freerdp - update to 2.11.8-1
freerdp-debuginfo - update to 2.11.8-1
freerdp-devel - update to 2.11.8-1
freerdp-help - update to 2.11.8-1
libwinpr - update to 2.11.8-1
freerdp3 (Ubuntu package) - addressed in versions 3.5.1+dfsg1-0ubuntu1.4, 3.16.0+dfsg-2ubuntu0.3
freerdp-sdl - update to 3.10.3-150700.3.14.1
librdtk0-0-debuginfo - update to 3.10.3-150700.3.14.1
libfreerdp3-3 - update to 3.10.3-150700.3.14.1
libfreerdp3-3-debuginfo - update to 3.10.3-150700.3.14.1
librdtk0-0 - update to 3.10.3-150700.3.14.1
freerdp-sdl-debuginfo - update to 3.10.3-150700.3.14.1
freerdp-proxy-plugins - update to 3.10.3-150700.3.14.1
libfreerdp-server-proxy3-3 - update to 3.10.3-150700.3.14.1
libfreerdp-server-proxy3-3-debuginfo - update to 3.10.3-150700.3.14.1
libwinpr3-3-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 - update to 3.10.3-150700.3.14.1

External References

Related Security Bulletins