CVE-2026-25959
Fixed in a distro release EPSS <1%CVSS 5.5
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_cliprdr_provide_data_` passes freed `pDstData` to `XChangeProperty` because the cliprdr channel thread calls `xf_cliprdr_server_format_data_response` which converts and uses the clipboard data without holding any lock, while the X11 event thread concurrently calls `xf_cliprdr_clear_cached_data` → `HashTable_Clear` which frees the same data via `xf_cached_data_free`, triggering a heap use after free. Version 3.23.0 fixes the issue.
Products: FreeRDP
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux 2023 | freerdp | 2:3.6.3-1.amzn2023.0.7 |
| Amazon Linux 2023 | freerdp-devel | 2:3.6.3-1.amzn2023.0.7 |
| Amazon Linux 2023 | freerdp-libs | 2:3.6.3-1.amzn2023.0.7 |
| Amazon Linux 2023 | freerdp-server | 2:3.6.3-1.amzn2023.0.7 |
| Amazon Linux 2023 | libwinpr | 2:3.6.3-1.amzn2023.0.7 |
| Amazon Linux 2023 | libwinpr-devel | 2:3.6.3-1.amzn2023.0.7 |
| Debian 12 | freerdp2 | no fix |
| Debian 13 | freerdp3 | 3.15.0+dfsg-2.1+deb13u1 |
| Debian 14 | freerdp3 | 3.23.0+dfsg-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 Tumbleweed | freerdp | 3.24.1-1.1 |