CVE-2026-56297
Fixed in a distro release EPSS <1%CVSS 7.0
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.
Products: FreeRDP
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux 2 | freerdp | 2:2.11.7-1.amzn2.0.5 |
| Amazon Linux 2 | freerdp-devel | 2:2.11.7-1.amzn2.0.5 |
| Amazon Linux 2 | freerdp-libs | 2:2.11.7-1.amzn2.0.5 |
| Amazon Linux 2 | libwinpr | 2:2.11.7-1.amzn2.0.5 |
| Amazon Linux 2 | libwinpr-devel | 2:2.11.7-1.amzn2.0.5 |
| Amazon Linux 2023 | freerdp | 2:3.6.3-1.amzn2023.0.13 |
| Amazon Linux 2023 | freerdp-devel | 2:3.6.3-1.amzn2023.0.13 |
| Amazon Linux 2023 | freerdp-libs | 2:3.6.3-1.amzn2023.0.13 |
| Amazon Linux 2023 | freerdp-server | 2:3.6.3-1.amzn2023.0.13 |
| Amazon Linux 2023 | libwinpr | 2:3.6.3-1.amzn2023.0.13 |
| Amazon Linux 2023 | libwinpr-devel | 2:3.6.3-1.amzn2023.0.13 |
| Debian 12 | freerdp2 | no fix |
| Debian 13 | freerdp3 | no fix |
| Debian 14 | freerdp3 | 3.22.0+dfsg-1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | freerdp | 3.10.3-150700.3.17.1 |
| 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 |