Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_clipboard_format_equal` reads freed `lastSentFormats` memory because `xf_clipboard_formats_free` (called from the cliprdr channel thread during auto-reconnect) frees the array while the X11 event thread concurrently iterates it in `xf_clipboard_changed`, triggering a heap use after free. Version 3.23.0 fixes the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FreeRDP | FreeRDP | < 3.23.0 | — |
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 | 3.23.0+dfsg-1 | — |
| Debian 13 | freerdp3 | 3.15.0+dfsg-2.1+deb13u1 | — |
| Debian 12 | freerdp2 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | freerdp3 | 3.16.0+dfsg-2ubuntu0.3 | USN-8105-1 |
| Ubuntu 24.04 LTS | freerdp3 | 3.5.1+dfsg1-0ubuntu1.4 | USN-8105-1 |
| Ubuntu 22.04 LTS | freerdp2 | No fix yet | — |
| Ubuntu 18.04 LTS | freerdp | No fix yet | — |
| Ubuntu 16.04 LTS | freerdp | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 | 2:3.10.3-5.el10_1.8 | RHSA-2026:19142, RHSA-2026:16014 |
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_0.7 | RHSA-2026:20605 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | freerdp +5 | 2:3.10.3-5.el10_1.8 | ALSA-2026:16014 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | freerdp | 2:3.10.3-5.el10_1.8 | RLSA-2026:19142, RLSA-2026:16014 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | freerdp | 3.24.1-1.1 | openSUSE-SU-2026:10408-1 |
| openSUSE Tumbleweed | freerdp2 | 2.11.7-8.1 | openSUSE-SU-2026:10611-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | freerdp | 3.23.0-r0 | — |
| Alpine v3.23 | freerdp | 3.23.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | freerdp +5 | 2:3.6.3-1.amzn2023.0.7 | ALAS2023-2026-1512 |
| Amazon Linux 2 | freerdp +4 | 2:2.11.7-1.amzn2.0.8 | ALAS2-2026-3221 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | freerdp +5 | 2:3.10.3-5.el10_1.8 | ELSA-2026-19142, ELSA-2026-16014 |
Advisories 14
- WID-SEC-2026-0514 FreeRDP: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- ALSA-2026:16014 Moderate: freerdp security update AlmaLinux Security Advisories · Oct 29, 2026
- USN-8105-1 freerdp3 vulnerabilities Ubuntu Security Notices (USN) · Oct 27, 2026
- RHSA-2026:20605 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Oct 7, 2026
- RHSA-2026:19142 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Oct 7, 2026
- RHSA-2026:16014 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Oct 7, 2026
- ELSA-2026-19142 Moderate: freerdp security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 22, 2026
- RLSA-2026:19142 Moderate: freerdp security update Rocky Linux Security Advisories · May 29, 2026
- RLSA-2026:16014 Moderate: freerdp security update Rocky Linux Security Advisories · May 13, 2026
- ELSA-2026-16014 Moderate: freerdp security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · May 11, 2026
- openSUSE-SU-2026:10611-1 freerdp2-2.11.7-8.1 on GA media SUSE / openSUSE Security Updates · Apr 26, 2026
- ALAS2023-2026-1512 Important: freerdp security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 1, 2026
- ALAS2-2026-3221 Important: freerdp security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 1, 2026
- openSUSE-SU-2026:10408-1 freerdp-3.24.1-1.1 on GA media SUSE / openSUSE Security Updates · Mar 24, 2026
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q5j3-m6jf-3jq4
- https://github.com/FreeRDP/FreeRDP/commit/58409406afe7c2a8a71ed2dc8e22075be4f41c0c
- https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L1884
- https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L1889
- https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L265
- https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L616
- https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L831
- https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L851-L855
- https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_cliprdr.c#L868-L875