Out-of-bounds write in FreeRDP - CVE-2026-26965

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Main Vulnerability Database Vulnerabilities #VU125344

Out-of-bounds write in FreeRDP - CVE-2026-26965

Published: April 8, 2026


Vulnerability identifier: #VU125344
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-26965
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to out-of-bounds write in planar_decompress_plane_rle() in the PLANAR RLE decode path when processing a crafted RDP planar bitmap in the temp-buffer path. A remote attacker can send a specially crafted RDP server response to execute arbitrary code.

User interaction is required because the victim must connect to a malicious RDP server.


Affected software

FreeRDP
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server for SAP Applications 15
Anolis OS
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for ARM 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 x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - 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 ARM 64 - Extended Update Support
SUSE Package Hub 15
openSUSE Leap
openEuler
Ubuntu
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
freerdp (Red Hat package)
freerdp-devel
winpr2-devel
libwinpr2-debuginfo
uwac0-0-devel
freerdp-wayland-debuginfo
freerdp-proxy
libwinpr2
libfreerdp2-debuginfo
freerdp-debugsource
freerdp-server-debuginfo
freerdp
libuwac0-0-debuginfo
freerdp-wayland
libuwac0-0
freerdp-server
freerdp-proxy-debuginfo
freerdp-debuginfo
libfreerdp2
winpr-devel
libfreerdp2-2
libfreerdp2-2-debuginfo
libwinpr2-2-debuginfo
libwinpr2-2
freerdp-libs
libwinpr
freerdp-doc
libwinpr-devel
freerdp2-debuginfo
freerdp2-proxy
freerdp2-server
freerdp2-proxy-debuginfo
freerdp2
freerdp2-server-debuginfo
freerdp2-devel
freerdp2-debugsource
freerdp-help
freerdp3 (Ubuntu package)
freerdp-sdl
libwinpr3-3-debuginfo
libfreerdp-server-proxy3-3
freerdp-proxy-plugins-debuginfo
freerdp-proxy-plugins
librdtk0-0
freerdp-sdl-debuginfo
libfreerdp3-3-debuginfo
librdtk0-0-debuginfo
libwinpr3-3
libfreerdp-server-proxy3-3-debuginfo
libfreerdp3-3

How to mitigate CVE-2026-26965

Install security update from vendor's website.

FreeRDP - update to 3.23.0
freerdp (Red Hat package) - addressed in versions 2.0.0-46.rc4.el8_2.8, 2.1.1-5.el7_9.5, 2.2.0-7.el8_6.3, 2.2.0-10.el8_4, 2.2.0-12.el8_8.3, 2.4.1-3.el9_0.2, 2.4.1-6.el9_2.4, 2.11.7-1.el9_6.5, 2.11.7-1.el9_7.3, 3.10.3-3.el10_0.3, 3.10.3-5.el10_1.3
freerdp-devel - addressed in versions 2.1.2-12.63.1, 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
winpr2-devel - addressed in versions 2.1.2-12.63.1, 2.4.0-150400.3.47.1, 2.11.7-150700.3.14.1
libwinpr2-debuginfo - update to 2.4.0-150400.3.47.1
uwac0-0-devel - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1
freerdp-wayland-debuginfo - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
freerdp-proxy - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
libwinpr2 - update to 2.4.0-150400.3.47.1
libfreerdp2-debuginfo - update to 2.4.0-150400.3.47.1
freerdp-debugsource - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
freerdp-server-debuginfo - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
freerdp - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
libuwac0-0-debuginfo - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
freerdp-wayland - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
libuwac0-0 - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
freerdp-server - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
freerdp-proxy-debuginfo - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
freerdp-debuginfo - addressed in versions 2.4.0-150400.3.47.1, 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
libfreerdp2 - update to 2.4.0-150400.3.47.1
winpr-devel - addressed in versions 2.11.2-150600.4.18.1, 3.10.3-150700.3.9.1
libfreerdp2-2 - addressed in versions 2.11.2-150600.4.18.1, 2.11.7-150700.3.14.1
libfreerdp2-2-debuginfo - addressed in versions 2.11.2-150600.4.18.1, 2.11.7-150700.3.14.1
libwinpr2-2-debuginfo - addressed in versions 2.11.2-150600.4.18.1, 2.11.7-150700.3.14.1
libwinpr2-2 - addressed in versions 2.11.2-150600.4.18.1, 2.11.7-150700.3.14.1
freerdp - update to 2.11.7-4.0.1
freerdp-libs - update to 2.11.7-4.0.1
freerdp-devel - update to 2.11.7-4.0.1
libwinpr - update to 2.11.7-4.0.1
freerdp-doc - update to 2.11.7-4.0.1
libwinpr-devel - update to 2.11.7-4.0.1
freerdp2-debuginfo - update to 2.11.7-150700.3.14.1
freerdp2-proxy - update to 2.11.7-150700.3.14.1
freerdp2-server - update to 2.11.7-150700.3.14.1
freerdp2-proxy-debuginfo - update to 2.11.7-150700.3.14.1
freerdp2 - update to 2.11.7-150700.3.14.1
freerdp2-server-debuginfo - update to 2.11.7-150700.3.14.1
freerdp2-devel - update to 2.11.7-150700.3.14.1
freerdp2-debugsource - update to 2.11.7-150700.3.14.1
freerdp-help - update to 2.11.8-3
freerdp-devel - update to 2.11.8-3
libwinpr - update to 2.11.8-3
libwinpr-devel - update to 2.11.8-3
freerdp - update to 2.11.8-3
freerdp-debuginfo - update to 2.11.8-3
freerdp-debugsource - update to 2.11.8-3
freerdp3 (Ubuntu package) - addressed in versions 3.5.1+dfsg1-0ubuntu1.4, 3.16.0+dfsg-2ubuntu0.3
freerdp-sdl - update to 3.10.3-150700.3.9.1
libwinpr3-3-debuginfo - update to 3.10.3-150700.3.9.1
libfreerdp-server-proxy3-3 - update to 3.10.3-150700.3.9.1
freerdp-proxy-plugins-debuginfo - update to 3.10.3-150700.3.9.1
freerdp-proxy-plugins - update to 3.10.3-150700.3.9.1
librdtk0-0 - update to 3.10.3-150700.3.9.1
freerdp-sdl-debuginfo - update to 3.10.3-150700.3.9.1
libfreerdp3-3-debuginfo - update to 3.10.3-150700.3.9.1
librdtk0-0-debuginfo - update to 3.10.3-150700.3.9.1
libwinpr3-3 - update to 3.10.3-150700.3.9.1
libfreerdp-server-proxy3-3-debuginfo - update to 3.10.3-150700.3.9.1
libfreerdp3-3 - update to 3.10.3-150700.3.9.1
freerdp - addressed in versions 3.23.0-1.fc42, 3.23.0-1.fc43, 3.23.0-1.fc44

External References

Related Security Bulletins