CVE-2026-40033
Fixed in a distro release EPSS 1%CVSS 8.8
FreeRDP before 3.26.0 contains a heap-buffer-overflow vulnerability in gdi_CacheToSurface that allows remote attackers to write out-of-bounds heap memory. The vulnerability occurs because rectangle validation clamps coordinates to UINT16_MAX but performs copy operations using unclamped cache entry dimensions, enabling malicious RDP servers to trigger large out-of-bounds writes and potentially achieve remote code execution or client crash.
Products: FreeRDP, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | freerdp | 2:3.10.3-12.el10_2.6 |
| AlmaLinux 10 | freerdp-devel | 2:3.10.3-12.el10_2.6 |
| AlmaLinux 10 | freerdp-libs | 2:3.10.3-12.el10_2.6 |
| AlmaLinux 10 | freerdp-server | 2:3.10.3-12.el10_2.6 |
| AlmaLinux 10 | libwinpr | 2:3.10.3-12.el10_2.6 |
| AlmaLinux 10 | libwinpr-devel | 2:3.10.3-12.el10_2.6 |
| Amazon Linux 2 | freerdp | 2:2.11.7-1.amzn2.0.12 |
| Amazon Linux 2 | freerdp-devel | 2:2.11.7-1.amzn2.0.12 |
| Amazon Linux 2 | freerdp-libs | 2:2.11.7-1.amzn2.0.12 |
| Amazon Linux 2 | libwinpr | 2:2.11.7-1.amzn2.0.12 |
| Amazon Linux 2 | libwinpr-devel | 2:2.11.7-1.amzn2.0.12 |
| Amazon Linux 2023 | freerdp | 2:3.6.3-1.amzn2023.0.12 |
| Amazon Linux 2023 | freerdp-devel | 2:3.6.3-1.amzn2023.0.12 |
| Amazon Linux 2023 | freerdp-libs | 2:3.6.3-1.amzn2023.0.12 |
| Amazon Linux 2023 | freerdp-server | 2:3.6.3-1.amzn2023.0.12 |
| Amazon Linux 2023 | libwinpr | 2:3.6.3-1.amzn2023.0.12 |
| Amazon Linux 2023 | libwinpr-devel | 2:3.6.3-1.amzn2023.0.12 |
| Debian 12 | freerdp2 | no fix |
| Debian 13 | freerdp3 | no fix |
| Debian 14 | freerdp3 | 3.26.0+dfsg-1 |
| Red Hat Enterprise Linux 10.2 | freerdp | 2:3.10.3-12.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | freerdp-debuginfo | 2:3.10.3-12.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | freerdp-debugsource | 2:3.10.3-12.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | freerdp-devel | 2:3.10.3-12.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | freerdp-libs | 2:3.10.3-12.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | freerdp-libs-debuginfo | 2:3.10.3-12.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | freerdp-server | 2:3.10.3-12.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | freerdp-server-debuginfo | 2:3.10.3-12.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | libwinpr | 2:3.10.3-12.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | libwinpr-debuginfo | 2:3.10.3-12.el10_2.6 |
| Red Hat Enterprise Linux 10.2 | libwinpr-devel | 2:3.10.3-12.el10_2.6 |
| Red Hat Enterprise Linux eus 10.0 | freerdp | 2:3.10.3-3.el10_0.9 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-debuginfo | 2:3.10.3-3.el10_0.9 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-debugsource | 2:3.10.3-3.el10_0.9 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-devel | 2:3.10.3-3.el10_0.9 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-libs | 2:3.10.3-3.el10_0.9 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-libs-debuginfo | 2:3.10.3-3.el10_0.9 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-server | 2:3.10.3-3.el10_0.9 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-server-debuginfo | 2:3.10.3-3.el10_0.9 |
| Red Hat Enterprise Linux eus 10.0 | libwinpr | 2:3.10.3-3.el10_0.9 |
| Red Hat Enterprise Linux eus 10.0 | libwinpr-debuginfo | 2:3.10.3-3.el10_0.9 |
| Red Hat Enterprise Linux eus 10.0 | libwinpr-devel | 2:3.10.3-3.el10_0.9 |
| Rocky Linux 10 | freerdp | 2:3.10.3-12.el10_2.6 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | freerdp | 3.10.3-150700.3.17.1 |
| SUSE Linux Enterprise Server 16.0 | freerdp | 3.26.0-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | freerdp | 3.26.0-160000.1.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP7 | freerdp | 3.10.3-150700.3.17.1 |
| Ubuntu 16.04 LTS | freerdp | no fix |
| Ubuntu 18.04 LTS | freerdp | no fix |
| Ubuntu 22.04 LTS | freerdp2 | no fix |
| Ubuntu 24.04 LTS | freerdp3 | 3.30.0+dfsg-0ubuntu0.24.04.1 |
| Ubuntu 25.10 | freerdp3 | no fix |
| Ubuntu 26.04 LTS | freerdp3 | 3.30.0+dfsg-0ubuntu0.26.04.1 |
| Ubuntu Pro 18.04 LTS | freerdp2 | no fix |
| Ubuntu Pro 20.04 LTS | freerdp2 | no fix |
| Ubuntu Pro 24.04 LTS | freerdp2 | no fix |
| openSUSE Leap 16.0 | freerdp | 3.26.0-160000.1.1 |
| openSUSE Tumbleweed | freerdp | 3.26.0-3.1 |