Heap-based buffer overflow in FreeRDP - CVE-2026-23884

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Main Vulnerability Database Vulnerabilities #VU121947

Heap-based buffer overflow in FreeRDP - CVE-2026-23884

Published: January 22, 2026


Vulnerability identifier: #VU121947
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-23884
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in gdi_set_bounds. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

FreeRDP
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Workstation Extension 15
Anolis OS
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
SUSE Package Hub 15
openSUSE Leap
openEuler
Ubuntu
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
freerdp (Red Hat package)
libwinpr-devel
libwinpr
freerdp-libs
freerdp-devel
freerdp
freerdp-debuginfo
libfreerdp2
libwinpr2-debuginfo
libuwac0-0-debuginfo
freerdp-server
winpr2-devel
freerdp-wayland-debuginfo
freerdp-wayland
uwac0-0-devel
freerdp-proxy-debuginfo
freerdp-proxy
libwinpr2
freerdp-debugsource
libuwac0-0
freerdp-server-debuginfo
libfreerdp2-debuginfo
freerdp-doc
freerdp2-debuginfo
freerdp2-proxy-debuginfo
libfreerdp2-2-debuginfo
libwinpr2-2-debuginfo
freerdp2-devel
freerdp2-server
freerdp2-proxy
freerdp2-server-debuginfo
libwinpr2-2
libfreerdp2-2
freerdp2-debugsource
freerdp2
freerdp-help
freerdp3 (Ubuntu package)

How to mitigate CVE-2026-23884

Install updates from vendor's website.

FreeRDP - update to 3.21.0
freerdp (Red Hat package) - addressed in versions 2.0.0-46.rc4.el8_2.6, 2.1.1-5.el7_9.1, 2.2.0-7.el8_4, 2.2.0-7.el8_6.1, 2.2.0-12.el8_8.1, 2.4.1-3.el9_0, 2.4.1-6.el9_2.2, 2.11.2-1.el9_4.1, 2.11.7-2.el8_10, 3.10.3-3.el10_0.1
libwinpr-devel - addressed in versions 2.1.1-5, 2.11.7-2.0.1
libwinpr - addressed in versions 2.1.1-5, 2.11.7-2.0.1
freerdp-libs - addressed in versions 2.1.1-5, 2.11.7-2.0.1
freerdp-devel - addressed in versions 2.1.1-5, 2.11.7-2.0.1
freerdp - addressed in versions 2.1.1-5, 2.11.7-2.0.1
freerdp-debuginfo - update to 2.4.0-150400.3.41.1
libfreerdp2 - update to 2.4.0-150400.3.41.1
libwinpr2-debuginfo - update to 2.4.0-150400.3.41.1
freerdp-devel - update to 2.4.0-150400.3.41.1
libuwac0-0-debuginfo - update to 2.4.0-150400.3.41.1
freerdp-server - update to 2.4.0-150400.3.41.1
freerdp - update to 2.4.0-150400.3.41.1
winpr2-devel - addressed in versions 2.4.0-150400.3.41.1, 2.11.7-150700.3.8.1
freerdp-wayland-debuginfo - update to 2.4.0-150400.3.41.1
freerdp-wayland - update to 2.4.0-150400.3.41.1
uwac0-0-devel - update to 2.4.0-150400.3.41.1
freerdp-proxy-debuginfo - update to 2.4.0-150400.3.41.1
freerdp-proxy - update to 2.4.0-150400.3.41.1
libwinpr2 - update to 2.4.0-150400.3.41.1
freerdp-debugsource - update to 2.4.0-150400.3.41.1
libuwac0-0 - update to 2.4.0-150400.3.41.1
freerdp-server-debuginfo - update to 2.4.0-150400.3.41.1
libfreerdp2-debuginfo - update to 2.4.0-150400.3.41.1
freerdp-doc - update to 2.11.7-2.0.1
freerdp2-debuginfo - update to 2.11.7-150700.3.8.1
freerdp2-proxy-debuginfo - update to 2.11.7-150700.3.8.1
libfreerdp2-2-debuginfo - update to 2.11.7-150700.3.8.1
libwinpr2-2-debuginfo - update to 2.11.7-150700.3.8.1
freerdp2-devel - update to 2.11.7-150700.3.8.1
freerdp2-server - update to 2.11.7-150700.3.8.1
freerdp2-proxy - update to 2.11.7-150700.3.8.1
freerdp2-server-debuginfo - update to 2.11.7-150700.3.8.1
libwinpr2-2 - update to 2.11.7-150700.3.8.1
libfreerdp2-2 - update to 2.11.7-150700.3.8.1
freerdp2-debugsource - update to 2.11.7-150700.3.8.1
freerdp2 - update to 2.11.7-150700.3.8.1
freerdp-debugsource - update to 2.11.8-1
freerdp-debuginfo - update to 2.11.8-1
freerdp - update to 2.11.8-1
libwinpr-devel - update to 2.11.8-1
libwinpr - update to 2.11.8-1
freerdp-help - update to 2.11.8-1
freerdp-devel - update to 2.11.8-1
freerdp3 (Ubuntu package) - addressed in versions 3.5.1+dfsg1-0ubuntu1.4, 3.16.0+dfsg-2ubuntu0.3

Links to Public Exploits and PoC-codes

External References

Related Security Bulletins