Description
FreeRDP before 3.22.0 contains a use-after-free vulnerability in dvcman_channel_close and dvcman_call_on_receive due to improper synchronization of channel_callback access. A malicious RDP server can trigger a race condition by sending DYNVC_DATA and DYNVC_CLOSE messages concurrently, causing heap-use-after-free in the drdynvc client thread and potentially enabling remote code execution or denial of service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FreeRDP | FreeRDP | < 3.22.0 | 3.22.0 |
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 | 3.22.0+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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | freerdp | 3.10.3-150700.3.17.1 | SUSE-SU-2026:3562-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | freerdp +5 | 2:3.6.3-1.amzn2023.0.13 | ALAS2023-2026-2012 |
| Amazon Linux 2 | freerdp +4 | 2:2.11.7-1.amzn2.0.5 | ALAS2-2026-3181 |
Advisories 5
- 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-2026-2248 FreeRDP: Schwachstelle ermöglicht Codeausführung und Denial of Service BSI CERT-Bund (WID) · Aug 11, 2026
- ALAS2023-2026-2012 Important: freerdp security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 4, 2026
- ALAS2-2026-3181 Important: freerdp security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 29, 2026
References
- GitHub Security Advisory (GHSA-3mv2-5q57-2v8h) vendor-advisory
- VulnCheck Advisory: FreeRDP - Use-After-Free via Race Condition in DRDYNVC Channel Callback third-party-advisory