CVE-2026-33977
Fixed in a distro release EPSS <1%CVSS 6.9
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, a malicious RDP server can crash the FreeRDP client by sending audio data in IMA ADPCM format with an invalid initial step index value (>= 89). The unvalidated step index is read directly from the network and used to index into a 89-entry lookup table, triggering a WINPR_ASSERT() failure and process abort via SIGABRT. This affects any FreeRDP client that has audio redirection (RDPSND) enabled, which is the default configuration. This issue has been patched in version 3.24.2.
Products: FreeRDP
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux 2 | freerdp | 2:2.11.7-1.amzn2.0.10 |
| Amazon Linux 2 | freerdp-devel | 2:2.11.7-1.amzn2.0.10 |
| Amazon Linux 2 | freerdp-libs | 2:2.11.7-1.amzn2.0.10 |
| Amazon Linux 2 | libwinpr | 2:2.11.7-1.amzn2.0.10 |
| Amazon Linux 2 | libwinpr-devel | 2:2.11.7-1.amzn2.0.10 |
| Amazon Linux 2023 | freerdp | 2:3.6.3-1.amzn2023.0.10 |
| Amazon Linux 2023 | freerdp-devel | 2:3.6.3-1.amzn2023.0.10 |
| Amazon Linux 2023 | freerdp-libs | 2:3.6.3-1.amzn2023.0.10 |
| Amazon Linux 2023 | freerdp-server | 2:3.6.3-1.amzn2023.0.10 |
| Amazon Linux 2023 | libwinpr | 2:3.6.3-1.amzn2023.0.10 |
| Amazon Linux 2023 | libwinpr-devel | 2:3.6.3-1.amzn2023.0.10 |
| Debian 12 | freerdp2 | no fix |
| Debian 13 | freerdp3 | 3.15.0+dfsg-2.1+deb13u2 |
| Debian 14 | freerdp3 | 3.24.2+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 |
| openSUSE Tumbleweed | freerdp | 3.24.2-1.1 |