Integer underflow in FreeRDP - CVE-2026-29776

Vulnerability identifier: #VU125362

CSH Severity: Low

CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-29776

CWE-ID: CWE-191

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to integer underflow in update_read_cache_bitmap_order() in libfreerdp/core/orders.c when processing a crafted bitmap cache order from the network. A remote attacker can send a specially crafted RDP update that causes excessive memory allocation and process termination to cause a denial of service.

User interaction is required, and exploitation occurs in the client while handling server-supplied RDP data.

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 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Package Hub 15
openSUSE Leap
openEuler
Fedora
freerdp-devel
winpr2-devel
freerdp-proxy
freerdp-debugsource
uwac0-0-devel
freerdp-server
freerdp-wayland
libuwac0-0-debuginfo
libfreerdp2
freerdp-wayland-debuginfo
libwinpr2
freerdp
libuwac0-0
freerdp-proxy-debuginfo
libfreerdp2-debuginfo
freerdp-server-debuginfo
libwinpr2-debuginfo
freerdp-debuginfo
libfreerdp2-2-debuginfo
libwinpr2-2
libfreerdp2-2
libwinpr2-2-debuginfo
winpr-devel
freerdp2-proxy-debuginfo
freerdp2-proxy
freerdp2-devel
freerdp2
freerdp2-server-debuginfo
freerdp2-server
freerdp2-debugsource
freerdp2-debuginfo
libwinpr-devel
libwinpr
freerdp-help
librdtk0-0
freerdp-sdl
libfreerdp3-3
libfreerdp3-3-debuginfo
freerdp-sdl-debuginfo
freerdp-proxy-plugins
libfreerdp-server-proxy3-3
libfreerdp-server-proxy3-3-debuginfo
libwinpr3-3-debuginfo
freerdp-proxy-plugins-debuginfo
librdtk0-0-debuginfo
libwinpr3-3

Install security update from vendor's website.

FreeRDP - update to 3.24.0
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
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-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-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
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
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
libfreerdp2 - 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
libwinpr2 - update to 2.4.0-150400.3.52.1
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-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-debuginfo - update to 2.4.0-150400.3.52.1
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
libfreerdp2-2-debuginfo - addressed in versions 2.11.2-150600.4.26.1, 2.11.7-150700.3.22.1
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
freerdp2-proxy-debuginfo - update to 2.11.7-150700.3.22.1
freerdp2-proxy - update to 2.11.7-150700.3.22.1
freerdp2-devel - update to 2.11.7-150700.3.22.1
freerdp2 - update to 2.11.7-150700.3.22.1
freerdp2-server-debuginfo - update to 2.11.7-150700.3.22.1
freerdp2-server - 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
libwinpr-devel - update to 2.11.8-2
libwinpr - update to 2.11.8-2
freerdp-help - update to 2.11.8-2
freerdp-devel - update to 2.11.8-2
freerdp-debugsource - update to 2.11.8-2
freerdp-debuginfo - update to 2.11.8-2
freerdp - update to 2.11.8-2
librdtk0-0 - update to 3.10.3-150700.3.14.1
freerdp-sdl - 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
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
librdtk0-0-debuginfo - update to 3.10.3-150700.3.14.1
libwinpr3-3 - 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

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c747-x4wf-cqrr

• Multiple vulnerabilities in FreeRDP
• Fedora 45 update for freerdp
• Fedora 44 update for freerdp
• Fedora 43 update for freerdp
• Fedora 42 update for freerdp
• Fedora 42 update for freerdp
• openEuler update for freerdp
• SUSE update for freerdp
• SUSE update for freerdp
• SUSE update for freerdp
• SUSE update for freerdp
• SUSE update for freerdp2