Main Vulnerability Database Vulnerabilities #VU121943

Heap-based buffer overflow in FreeRDP - CVE-2026-23530

Published: January 22, 2026 / Updated: January 22, 2026

Vulnerability identifier: #VU121943

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-2026-23530

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 planar_decompress_plane_rle. 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 Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Workstation Extension 15
Anolis OS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_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
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
SUSE Package Hub 15
openSUSE Leap
Ubuntu
openEuler
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
freerdp (Red Hat package)
libwinpr-devel
freerdp
freerdp-devel
freerdp-libs
libwinpr
winpr2-devel
freerdp2 (Ubuntu package)
freerdp-proxy-debuginfo
freerdp-debugsource
libfreerdp2
libfreerdp2-debuginfo
libwinpr2-debuginfo
freerdp-debuginfo
freerdp-wayland-debuginfo
freerdp-server-debuginfo
freerdp-proxy
libwinpr2
freerdp-server
freerdp-wayland
libuwac0-0
uwac0-0-devel
libuwac0-0-debuginfo
libwinpr2-2-debuginfo
libfreerdp2-2-debuginfo
libwinpr2-2
winpr-devel
libfreerdp2-2
freerdp-doc
freerdp2-debugsource
freerdp2
freerdp2-server
freerdp2-proxy-debuginfo
freerdp2-server-debuginfo
freerdp2-devel
freerdp2-proxy
freerdp2-debuginfo
freerdp-help
freerdp3 (Ubuntu package)

How to mitigate CVE-2026-23530

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
freerdp - 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-libs - 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
winpr2-devel - addressed in versions 2.1.2-12.52.1, 2.4.0-150400.3.35.1, 2.11.7-150700.3.3.1
freerdp-devel - addressed in versions 2.1.2-12.52.1, 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
freerdp2 (Ubuntu package) - addressed in versions 2.2.0+dfsg1-0ubuntu0.18.04.4+esm3, 2.6.1+dfsg1-0ubuntu0.20.04.2+esm1, 2.6.1+dfsg1-3ubuntu2.8, 2.11.5+dfsg1-1ubuntu0.1~esm3
freerdp-proxy-debuginfo - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
freerdp-debugsource - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
libfreerdp2 - update to 2.4.0-150400.3.35.1
libfreerdp2-debuginfo - update to 2.4.0-150400.3.35.1
libwinpr2-debuginfo - update to 2.4.0-150400.3.35.1
freerdp-debuginfo - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
freerdp-wayland-debuginfo - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
freerdp - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
freerdp-server-debuginfo - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
freerdp-proxy - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
libwinpr2 - update to 2.4.0-150400.3.35.1
freerdp-server - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
freerdp-wayland - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
libuwac0-0 - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
uwac0-0-devel - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
libuwac0-0-debuginfo - addressed in versions 2.4.0-150400.3.35.1, 2.11.2-150600.4.6.1
libwinpr2-2-debuginfo - addressed in versions 2.11.2-150600.4.6.1, 2.11.7-150700.3.3.1
libfreerdp2-2-debuginfo - addressed in versions 2.11.2-150600.4.6.1, 2.11.7-150700.3.3.1
libwinpr2-2 - addressed in versions 2.11.2-150600.4.6.1, 2.11.7-150700.3.3.1
winpr-devel - update to 2.11.2-150600.4.6.1
libfreerdp2-2 - addressed in versions 2.11.2-150600.4.6.1, 2.11.7-150700.3.3.1
freerdp-doc - update to 2.11.7-2.0.1
freerdp2-debugsource - update to 2.11.7-150700.3.3.1
freerdp2 - update to 2.11.7-150700.3.3.1
freerdp2-server - update to 2.11.7-150700.3.3.1
freerdp2-proxy-debuginfo - update to 2.11.7-150700.3.3.1
freerdp2-server-debuginfo - update to 2.11.7-150700.3.3.1
freerdp2-devel - update to 2.11.7-150700.3.3.1
freerdp2-proxy - update to 2.11.7-150700.3.3.1
freerdp2-debuginfo - update to 2.11.7-150700.3.3.1
freerdp-debuginfo - update to 2.11.8-1
freerdp - update to 2.11.8-1
freerdp-debugsource - 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
libwinpr-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

Exploit #12331 - Heap-buffer-overflow in planar_decompress_plane_rle (January 22, 2026)

External References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-r4hv-852m-fq7p