Out-of-bounds read in FreeRDP - CVE-2026-31897

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Main Vulnerability Database Vulnerabilities #VU125357

Out-of-bounds read in FreeRDP - CVE-2026-31897

Published: April 8, 2026


Vulnerability identifier: #VU125357
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-31897
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to out-of-bounds read in freerdp_bitmap_decompress_planar when processing a planar bitmap with SrcSize set to 0. A remote attacker can send a crafted RDPGFX Surface Command to disclose sensitive information.

User interaction is required, and the Bitmap Update PDU path is not affected because it validates the bitmap length before calling the decoder.


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
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
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-2026-31897

Install security update from vendor's website.

FreeRDP - update to 3.24.0
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
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 3.24.0-1.fc42, 3.24.0-1.fc43, 3.24.0-1.fc44, 3.24.0-1.fc45, 3.24.2-1.fc42

External References

Related Security Bulletins