CVE-2026-26955
Fixed in a distro release EPSS <1%CVSS 8.8
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a malicious RDP server can trigger a heap buffer overflow in FreeRDP clients using the GDI surface pipeline (e.g., `xfreerdp`) by sending an RDPGFX ClearCodec surface command with an out-of-bounds destination rectangle. The `gdi_SurfaceCommand_ClearCodec()` handler does not call `is_within_surface()` to validate the command rectangle against the destination surface dimensions, allowing attacker-controlled `cmd->left`/`cmd->top` (and subcodec rectangle offsets) to reach image copy routines that write into `surface->data` without bounds enforcement. The OOB write corrupts an adjacent `gdiGfxSurface` struct's `codecs*` pointer with attacker-controlled pixel data, and corruption of `codecs*` is sufficient to reach an indirect function pointer call (`NSC_CONTEXT.decode` at `nsc.c:500`) on a subsequent codec command — full instruction pointer (RIP) control demonstrated in exploitability harness. Users should upgrade to version 3.23.0 to receive a patch.
Products: FreeRDP, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Telecommunications Update Service, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat Enterprise Linux 6
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | freerdp | 2:3.10.3-5.el10_1.3 |
| AlmaLinux 10 | freerdp-devel | 2:3.10.3-5.el10_1.3 |
| AlmaLinux 10 | freerdp-libs | 2:3.10.3-5.el10_1.3 |
| AlmaLinux 10 | freerdp-server | 2:3.10.3-5.el10_1.3 |
| AlmaLinux 10 | libwinpr | 2:3.10.3-5.el10_1.3 |
| AlmaLinux 10 | libwinpr-devel | 2:3.10.3-5.el10_1.3 |
| AlmaLinux 8 | freerdp | 2:2.11.7-4.el8_10 |
| AlmaLinux 8 | freerdp-devel | 2:2.11.7-4.el8_10 |
| AlmaLinux 8 | freerdp-libs | 2:2.11.7-4.el8_10 |
| AlmaLinux 8 | libwinpr | 2:2.11.7-4.el8_10 |
| AlmaLinux 8 | libwinpr-devel | 2:2.11.7-4.el8_10 |
| AlmaLinux 9 | freerdp | 2:2.11.7-1.el9_7.3 |
| AlmaLinux 9 | freerdp-devel | 2:2.11.7-1.el9_7.3 |
| AlmaLinux 9 | freerdp-libs | 2:2.11.7-1.el9_7.3 |
| AlmaLinux 9 | libwinpr | 2:2.11.7-1.el9_7.3 |
| AlmaLinux 9 | libwinpr-devel | 2:2.11.7-1.el9_7.3 |
| Debian 12 | freerdp2 | no fix |
| Debian 13 | freerdp3 | 3.15.0+dfsg-2.1+deb13u1 |
| Debian 14 | freerdp3 | 3.23.0+dfsg-1 |
| Red Hat Enterprise Linux 10.1 | freerdp | 2:3.10.3-5.el10_1.3 |
| Red Hat Enterprise Linux 10.1 | freerdp-debuginfo | 2:3.10.3-5.el10_1.3 |
| Red Hat Enterprise Linux 10.1 | freerdp-debugsource | 2:3.10.3-5.el10_1.3 |
| Red Hat Enterprise Linux 10.1 | freerdp-devel | 2:3.10.3-5.el10_1.3 |
| Red Hat Enterprise Linux 10.1 | freerdp-libs | 2:3.10.3-5.el10_1.3 |
| Red Hat Enterprise Linux 10.1 | freerdp-libs-debuginfo | 2:3.10.3-5.el10_1.3 |
| Red Hat Enterprise Linux 10.1 | freerdp-server | 2:3.10.3-5.el10_1.3 |
| Red Hat Enterprise Linux 10.1 | freerdp-server-debuginfo | 2:3.10.3-5.el10_1.3 |
| Red Hat Enterprise Linux 10.1 | libwinpr | 2:3.10.3-5.el10_1.3 |
| Red Hat Enterprise Linux 10.1 | libwinpr-debuginfo | 2:3.10.3-5.el10_1.3 |
| Red Hat Enterprise Linux 10.1 | libwinpr-devel | 2:3.10.3-5.el10_1.3 |
| Red Hat Enterprise Linux 10.2 | freerdp | 2:3.10.3-12.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | freerdp-debuginfo | 2:3.10.3-12.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | freerdp-debugsource | 2:3.10.3-12.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | freerdp-devel | 2:3.10.3-12.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | freerdp-libs | 2:3.10.3-12.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | freerdp-libs-debuginfo | 2:3.10.3-12.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | freerdp-server | 2:3.10.3-12.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | freerdp-server-debuginfo | 2:3.10.3-12.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | libwinpr | 2:3.10.3-12.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | libwinpr-debuginfo | 2:3.10.3-12.el10_2.2 |
| Red Hat Enterprise Linux 10.2 | libwinpr-devel | 2:3.10.3-12.el10_2.2 |
| Red Hat Enterprise Linux 8 | freerdp | 2:2.11.7-4.el8_10 |
| Red Hat Enterprise Linux 8 | freerdp-debuginfo | 2:2.11.7-4.el8_10 |
| Red Hat Enterprise Linux 8 | freerdp-debugsource | 2:2.11.7-4.el8_10 |
| Red Hat Enterprise Linux 8 | freerdp-devel | 2:2.11.7-4.el8_10 |
| Red Hat Enterprise Linux 8 | freerdp-libs | 2:2.11.7-4.el8_10 |
| Red Hat Enterprise Linux 8 | freerdp-libs-debuginfo | 2:2.11.7-4.el8_10 |
| Red Hat Enterprise Linux 8 | libwinpr | 2:2.11.7-4.el8_10 |
| Red Hat Enterprise Linux 8 | libwinpr-debuginfo | 2:2.11.7-4.el8_10 |
| Red Hat Enterprise Linux 8 | libwinpr-devel | 2:2.11.7-4.el8_10 |
| Red Hat Enterprise Linux 9 | freerdp | 2:2.11.7-1.el9_7.3 |
| Red Hat Enterprise Linux 9 | freerdp-debuginfo | 2:2.11.7-1.el9_7.3 |
| Red Hat Enterprise Linux 9 | freerdp-debugsource | 2:2.11.7-1.el9_7.3 |
| Red Hat Enterprise Linux 9 | freerdp-devel | 2:2.11.7-1.el9_7.3 |
| Red Hat Enterprise Linux 9 | freerdp-libs | 2:2.11.7-1.el9_7.3 |
| Red Hat Enterprise Linux 9 | freerdp-libs-debuginfo | 2:2.11.7-1.el9_7.3 |
| Red Hat Enterprise Linux 9 | libwinpr | 2:2.11.7-1.el9_7.3 |
| Red Hat Enterprise Linux 9 | libwinpr-debuginfo | 2:2.11.7-1.el9_7.3 |
| Red Hat Enterprise Linux 9 | libwinpr-devel | 2:2.11.7-1.el9_7.3 |
| Red Hat Enterprise Linux eus 10.0 | freerdp | 2:3.10.3-3.el10_0.3 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-debuginfo | 2:3.10.3-3.el10_0.3 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-debugsource | 2:3.10.3-3.el10_0.3 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-devel | 2:3.10.3-3.el10_0.3 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-libs | 2:3.10.3-3.el10_0.3 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-libs-debuginfo | 2:3.10.3-3.el10_0.3 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-server | 2:3.10.3-3.el10_0.3 |
| Red Hat Enterprise Linux eus 10.0 | freerdp-server-debuginfo | 2:3.10.3-3.el10_0.3 |
| Red Hat Enterprise Linux eus 10.0 | libwinpr | 2:3.10.3-3.el10_0.3 |
| Red Hat Enterprise Linux eus 10.0 | libwinpr-debuginfo | 2:3.10.3-3.el10_0.3 |
| Red Hat Enterprise Linux eus 10.0 | libwinpr-devel | 2:3.10.3-3.el10_0.3 |
| Red Hat rhel aus 8.2 | freerdp | 2:2.0.0-46.rc4.el8_2.8 |
| Red Hat rhel aus 8.2 | freerdp-debuginfo | 2:2.0.0-46.rc4.el8_2.8 |
| Red Hat rhel aus 8.2 | freerdp-debugsource | 2:2.0.0-46.rc4.el8_2.8 |
| Red Hat rhel aus 8.2 | freerdp-libs | 2:2.0.0-46.rc4.el8_2.8 |
| Red Hat rhel aus 8.2 | freerdp-libs-debuginfo | 2:2.0.0-46.rc4.el8_2.8 |
| Red Hat rhel aus 8.2 | libwinpr | 2:2.0.0-46.rc4.el8_2.8 |
| Red Hat rhel aus 8.2 | libwinpr-debuginfo | 2:2.0.0-46.rc4.el8_2.8 |
| Red Hat rhel aus 8.2 | libwinpr-devel | 2:2.0.0-46.rc4.el8_2.8 |
| Red Hat rhel aus 8.4 | freerdp | 2:2.2.0-10.el8_4 |
| Red Hat rhel aus 8.4 | freerdp-debuginfo | 2:2.2.0-10.el8_4 |
| Red Hat rhel aus 8.4 | freerdp-debugsource | 2:2.2.0-10.el8_4 |
| Red Hat rhel aus 8.4 | freerdp-libs | 2:2.2.0-10.el8_4 |
| Red Hat rhel aus 8.4 | freerdp-libs-debuginfo | 2:2.2.0-10.el8_4 |
| Red Hat rhel aus 8.4 | libwinpr | 2:2.2.0-10.el8_4 |
| Red Hat rhel aus 8.4 | libwinpr-debuginfo | 2:2.2.0-10.el8_4 |
| Red Hat rhel aus 8.4 | libwinpr-devel | 2:2.2.0-10.el8_4 |
| Red Hat rhel aus 8.6 | freerdp | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel aus 8.6 | freerdp-debuginfo | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel aus 8.6 | freerdp-debugsource | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel aus 8.6 | freerdp-libs | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel aus 8.6 | freerdp-libs-debuginfo | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel aus 8.6 | libwinpr | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel aus 8.6 | libwinpr-debuginfo | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel aus 8.6 | libwinpr-devel | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel e4s 8.6 | freerdp | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel e4s 8.6 | freerdp-debuginfo | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel e4s 8.6 | freerdp-debugsource | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel e4s 8.6 | freerdp-libs | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel e4s 8.6 | freerdp-libs-debuginfo | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel e4s 8.6 | libwinpr | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel e4s 8.6 | libwinpr-debuginfo | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel e4s 8.6 | libwinpr-devel | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel e4s 8.8 | freerdp | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel e4s 8.8 | freerdp-debuginfo | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel e4s 8.8 | freerdp-debugsource | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel e4s 8.8 | freerdp-libs | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel e4s 8.8 | freerdp-libs-debuginfo | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel e4s 8.8 | libwinpr | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel e4s 8.8 | libwinpr-debuginfo | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel e4s 8.8 | libwinpr-devel | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel e4s 9.0 | freerdp | 2:2.4.1-3.el9_0.2 |
| Red Hat rhel e4s 9.0 | freerdp-debuginfo | 2:2.4.1-3.el9_0.2 |
| Red Hat rhel e4s 9.0 | freerdp-debugsource | 2:2.4.1-3.el9_0.2 |
| Red Hat rhel e4s 9.0 | freerdp-libs | 2:2.4.1-3.el9_0.2 |
| Red Hat rhel e4s 9.0 | freerdp-libs-debuginfo | 2:2.4.1-3.el9_0.2 |
| Red Hat rhel e4s 9.0 | libwinpr | 2:2.4.1-3.el9_0.2 |
| Red Hat rhel e4s 9.0 | libwinpr-debuginfo | 2:2.4.1-3.el9_0.2 |
| Red Hat rhel e4s 9.2 | freerdp | 2:2.4.1-6.el9_2.4 |
| Red Hat rhel e4s 9.2 | freerdp-debuginfo | 2:2.4.1-6.el9_2.4 |
| Red Hat rhel e4s 9.2 | freerdp-debugsource | 2:2.4.1-6.el9_2.4 |
| Red Hat rhel e4s 9.2 | freerdp-libs | 2:2.4.1-6.el9_2.4 |
| Red Hat rhel e4s 9.2 | freerdp-libs-debuginfo | 2:2.4.1-6.el9_2.4 |
| Red Hat rhel e4s 9.2 | libwinpr | 2:2.4.1-6.el9_2.4 |
| Red Hat rhel e4s 9.2 | libwinpr-debuginfo | 2:2.4.1-6.el9_2.4 |
| Red Hat rhel els 7 | freerdp | 0:2.1.1-5.el7_9.5 |
| Red Hat rhel els 7 | freerdp-debuginfo | 0:2.1.1-5.el7_9.5 |
| Red Hat rhel els 7 | freerdp-devel | 0:2.1.1-5.el7_9.5 |
| Red Hat rhel els 7 | freerdp-libs | 0:2.1.1-5.el7_9.5 |
| Red Hat rhel els 7 | libwinpr | 0:2.1.1-5.el7_9.5 |
| Red Hat rhel els 7 | libwinpr-devel | 0:2.1.1-5.el7_9.5 |
| Red Hat rhel eus 9.4 | freerdp | 2:2.11.2-1.el9_4.3 |
| Red Hat rhel eus 9.4 | freerdp-debuginfo | 2:2.11.2-1.el9_4.3 |
| Red Hat rhel eus 9.4 | freerdp-debugsource | 2:2.11.2-1.el9_4.3 |
| Red Hat rhel eus 9.4 | freerdp-devel | 2:2.11.2-1.el9_4.3 |
| Red Hat rhel eus 9.4 | freerdp-libs | 2:2.11.2-1.el9_4.3 |
| Red Hat rhel eus 9.4 | freerdp-libs-debuginfo | 2:2.11.2-1.el9_4.3 |
| Red Hat rhel eus 9.4 | libwinpr | 2:2.11.2-1.el9_4.3 |
| Red Hat rhel eus 9.4 | libwinpr-debuginfo | 2:2.11.2-1.el9_4.3 |
| Red Hat rhel eus 9.4 | libwinpr-devel | 2:2.11.2-1.el9_4.3 |
| Red Hat rhel eus 9.6 | freerdp | 2:2.11.7-1.el9_6.5 |
| Red Hat rhel eus 9.6 | freerdp-debuginfo | 2:2.11.7-1.el9_6.5 |
| Red Hat rhel eus 9.6 | freerdp-debugsource | 2:2.11.7-1.el9_6.5 |
| Red Hat rhel eus 9.6 | freerdp-devel | 2:2.11.7-1.el9_6.5 |
| Red Hat rhel eus 9.6 | freerdp-libs | 2:2.11.7-1.el9_6.5 |
| Red Hat rhel eus 9.6 | freerdp-libs-debuginfo | 2:2.11.7-1.el9_6.5 |
| Red Hat rhel eus 9.6 | libwinpr | 2:2.11.7-1.el9_6.5 |
| Red Hat rhel eus 9.6 | libwinpr-debuginfo | 2:2.11.7-1.el9_6.5 |
| Red Hat rhel eus 9.6 | libwinpr-devel | 2:2.11.7-1.el9_6.5 |
| Red Hat rhel eus long life 8.4 | freerdp | 2:2.2.0-10.el8_4 |
| Red Hat rhel eus long life 8.4 | freerdp-debuginfo | 2:2.2.0-10.el8_4 |
| Red Hat rhel eus long life 8.4 | freerdp-debugsource | 2:2.2.0-10.el8_4 |
| Red Hat rhel eus long life 8.4 | freerdp-libs | 2:2.2.0-10.el8_4 |
| Red Hat rhel eus long life 8.4 | freerdp-libs-debuginfo | 2:2.2.0-10.el8_4 |
| Red Hat rhel eus long life 8.4 | libwinpr | 2:2.2.0-10.el8_4 |
| Red Hat rhel eus long life 8.4 | libwinpr-debuginfo | 2:2.2.0-10.el8_4 |
| Red Hat rhel eus long life 8.4 | libwinpr-devel | 2:2.2.0-10.el8_4 |
| Red Hat rhel tus 8.6 | freerdp | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel tus 8.6 | freerdp-debuginfo | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel tus 8.6 | freerdp-debugsource | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel tus 8.6 | freerdp-libs | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel tus 8.6 | freerdp-libs-debuginfo | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel tus 8.6 | libwinpr | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel tus 8.6 | libwinpr-debuginfo | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel tus 8.6 | libwinpr-devel | 2:2.2.0-7.el8_6.3 |
| Red Hat rhel tus 8.8 | freerdp | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel tus 8.8 | freerdp-debuginfo | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel tus 8.8 | freerdp-debugsource | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel tus 8.8 | freerdp-libs | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel tus 8.8 | freerdp-libs-debuginfo | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel tus 8.8 | libwinpr | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel tus 8.8 | libwinpr-debuginfo | 2:2.2.0-12.el8_8.3 |
| Red Hat rhel tus 8.8 | libwinpr-devel | 2:2.2.0-12.el8_8.3 |
| Rocky Linux 8 | freerdp | 2:2.11.7-4.el8_10 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | freerdp | 2.11.2-150600.4.18.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | freerdp | 3.10.3-150700.3.9.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | freerdp | 2.4.0-150400.3.47.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | freerdp2 | 2.11.7-150700.3.14.1 |
| SUSE Linux Enterprise Server 12 SP5-LTSS | freerdp | 2.1.2-12.63.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | freerdp | 2.1.2-12.63.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP7 | freerdp | 3.10.3-150700.3.9.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP7 | freerdp2 | 2.11.7-150700.3.14.1 |
| 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 | 3.5.1+dfsg1-0ubuntu1.4 |
| Ubuntu 25.10 | freerdp3 | 3.16.0+dfsg-2ubuntu0.3 |
| 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 15.6 | freerdp | 2.11.2-150600.4.18.1 |
| openSUSE Tumbleweed | freerdp | 3.24.1-1.1 |
| openSUSE Tumbleweed | freerdp2 | 2.11.7-6.1 |