Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FreeRDP | FreeRDP | < 3.26.0 | 3.26.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | freerdp3 | 3.26.0+dfsg-1 | — |
| Debian 13 | freerdp3 | No fix yet | — |
| Debian 12 | freerdp2 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | freerdp3 | 3.30.0+dfsg-0ubuntu0.26.04.1 | USN-8561-1 |
| Ubuntu 25.10 | freerdp3 | No fix yet | — |
| Ubuntu 24.04 LTS | freerdp3 | 3.30.0+dfsg-0ubuntu0.24.04.1 | USN-8561-1 |
| Ubuntu 22.04 LTS | freerdp2 | No fix yet | — |
| Ubuntu 18.04 LTS | freerdp | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | freerdp | No fix yet | — |
| Ubuntu Pro 24.04 LTS | freerdp2 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | freerdp2 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | freerdp2 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | freerdp +5 | 2:3.10.3-12.el10_2.6 | RHSA-2026:36203 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | freerdp +5 | 2:3.10.3-3.el10_0.9 | RHSA-2026:46393 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | freerdp +5 | 2:3.10.3-12.el10_2.6 | ALSA-2026:36203 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | freerdp | 2:3.10.3-12.el10_2.6 | RLSA-2026:36203 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | freerdp | 3.10.3-150700.3.17.1 | SUSE-SU-2026:3562-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | freerdp | 3.26.0-160000.1.1 | SUSE-SU-2026:22194-1 |
| SLES 16.0 | freerdp | 3.26.0-160000.1.1 | SUSE-SU-2026:22194-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | freerdp | 3.26.0-3.1 | openSUSE-SU-2026:10948-1 |
| openSUSE Leap 16.0 | freerdp | 3.26.0-160000.1.1 | openSUSE-SU-2026:21116-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | freerdp +5 | 2:3.6.3-1.amzn2023.0.12 | ALAS2023-2026-1822 |
| Amazon Linux 2 | freerdp +4 | 2:2.11.7-1.amzn2.0.12 | ALAS2-2026-3356 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | freerdp +5 | 2:3.10.3-12.el10_2.6 | ELSA-2026-36203 |
Advisories 13
- ALSA-2026:36203 Important: freerdp security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:46393 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Oct 7, 2026
- RHSA-2026:36203 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Oct 7, 2026
- USN-8561-1 freerdp3 vulnerabilities Ubuntu Security Notices (USN) · Oct 1, 2026
- SUSE-SU-2026:3562-1 Security update for freerdp SUSE / openSUSE Security Updates · Aug 12, 2026
- WID-SEC-2026-1470 FreeRDP: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 11, 2026
- ELSA-2026-36203 Important: freerdp security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- RLSA-2026:36203 Important: freerdp security update Rocky Linux Security Advisories · Jul 8, 2026
- openSUSE-SU-2026:21116-1 Security update for freerdp SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:22194-1 Security update for freerdp SUSE / openSUSE Security Updates · Jun 24, 2026
- ALAS2-2026-3356 Important: freerdp security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- ALAS2023-2026-1822 Important: freerdp security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- openSUSE-SU-2026:10948-1 freerdp-3.26.0-3.1 on GA media SUSE / openSUSE Security Updates · Jun 4, 2026
References
- GitHub Security Advisory (GHSA-p6r2-4hgm-m6ff) vendor-advisory
- https://github.com/FreeRDP/FreeRDP/pull/12713 issue-tracking patch
- https://github.com/FreeRDP/FreeRDP/commit/d7508ebcd82842a691ae4941e5104d14240a89ae patch
- https://www.vulncheck.com/advisories/freerdp-heap-buffer-overflow-in-gdi-cachetosurface-via-rectangle-validation-bypass third-party-advisory