Heap-based buffer overflow in FreeRDP - CVE-2026-22855

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Main Vulnerability Database Vulnerabilities #VU122506

Heap-based buffer overflow in FreeRDP - CVE-2026-22855

Published: February 10, 2026


Vulnerability identifier: #VU122506
CSH Severity: High
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-22855
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: No public exploit 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 smartcard_unpack_set_attrib_call() function. A remote attacker can trick the victim into connecting to a malicious server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Affected software

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

How to mitigate CVE-2026-22855

Install updates from vendor's website.

FreeRDP - update to 3.20.1
freerdp (Red Hat package) - addressed in versions 2.2.0-7.el8_6.2, 2.2.0-8.el8_4, 2.2.0-12.el8_8.2, 2.4.1-3.el9_0.1, 2.4.1-6.el9_2.3, 2.11.2-1.el9_4.2, 2.11.7-1.el9_7.2, 2.11.7-3.el8_10, 3.10.3-3.el10_0.2, 3.10.3-5.el10_1.2
freerdp-server-debuginfo - update to 2.4.0-150400.3.41.1
libfreerdp2-debuginfo - update to 2.4.0-150400.3.41.1
freerdp-proxy-debuginfo - update to 2.4.0-150400.3.41.1
uwac0-0-devel - update to 2.4.0-150400.3.41.1
freerdp-wayland - update to 2.4.0-150400.3.41.1
freerdp-wayland-debuginfo - update to 2.4.0-150400.3.41.1
freerdp-debuginfo - update to 2.4.0-150400.3.41.1
freerdp - update to 2.4.0-150400.3.41.1
freerdp-server - update to 2.4.0-150400.3.41.1
libuwac0-0-debuginfo - update to 2.4.0-150400.3.41.1
freerdp-devel - update to 2.4.0-150400.3.41.1
libwinpr2-debuginfo - update to 2.4.0-150400.3.41.1
libfreerdp2 - 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
winpr2-devel - addressed in versions 2.4.0-150400.3.41.1, 2.11.7-150700.3.8.1
freerdp-doc - update to 2.11.7-3.0.1
libwinpr-devel - update to 2.11.7-3.0.1
freerdp - update to 2.11.7-3.0.1
freerdp-devel - update to 2.11.7-3.0.1
freerdp-libs - update to 2.11.7-3.0.1
libwinpr - update to 2.11.7-3.0.1
freerdp2-server-debuginfo - update to 2.11.7-150700.3.8.1
freerdp2-debuginfo - update to 2.11.7-150700.3.8.1
freerdp2-debugsource - update to 2.11.7-150700.3.8.1
libfreerdp2-2 - update to 2.11.7-150700.3.8.1
libwinpr2-2 - 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 - 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-proxy-debuginfo - update to 2.11.7-150700.3.8.1
freerdp-debuginfo - update to 2.11.8-1
libwinpr-devel - update to 2.11.8-1
freerdp - 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
freerdp-debugsource - update to 2.11.8-1
freerdp3 (Ubuntu package) - addressed in versions 3.5.1+dfsg1-0ubuntu1.4, 3.16.0+dfsg-2ubuntu0.3

External References

Related Security Bulletins