freerdp3-shadow-x11: FreeRDP is a free implementation of the Remote Desktop Protocol
CVE-2026-33977 is fixed in 23 products on 1 platform, first by DEBIAN-CVE-2026-33977, released March 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| freerdp · amzn 2023 | 2:3.6.3-1.amzn2023.0.10 | ALAS2023-2026-1549 | Apr 13, 2026 |
| freerdp · sles 15.7 | 3.10.3-150700.3.17.1 | SUSE-SU-2026:3562-1 | Aug 10, 2026 |
| freerdp-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.10 | ALAS2023-2026-1549 | Apr 13, 2026 |
| freerdp-debugsource · amzn 2023 | 2:3.6.3-1.amzn2023.0.10 | ALAS2023-2026-1549 | Apr 13, 2026 |
| freerdp-devel · amzn 2023 | 2:3.6.3-1.amzn2023.0.10 | ALAS2023-2026-1549 | Apr 13, 2026 |
| freerdp-libs · amzn 2023 | 2:3.6.3-1.amzn2023.0.10 | ALAS2023-2026-1549 | Apr 13, 2026 |
| freerdp-libs-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.10 | ALAS2023-2026-1549 | Apr 13, 2026 |
| freerdp-server · amzn 2023 | 2:3.6.3-1.amzn2023.0.10 | ALAS2023-2026-1549 | Apr 13, 2026 |
| freerdp-server-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.10 | ALAS2023-2026-1549 | Apr 13, 2026 |
| freerdp3 · Debian 13.5 (trixie) | 3.15.0+dfsg-2.1+deb13u2 | DEBIAN-CVE-2026-33977 | Mar 30, 2026 |
| freerdp3 · Debian 14 | 3.24.2+dfsg-1 | DEBIAN-CVE-2026-33977 | Mar 30, 2026 |
| freerdp3-shadow-x11 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | freerdp3-shadow-x11 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| freerdp3-wayland · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | freerdp3-wayland 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| freerdp3-x11 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | freerdp3-x11 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libfreerdp-client3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-client3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libfreerdp-server3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-server3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libfreerdp-shadow-subsystem3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-shadow-subsystem3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libfreerdp-shadow3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libfreerdp-shadow3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libfreerdp3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libfreerdp3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libwinpr · amzn 2023 | 2:3.6.3-1.amzn2023.0.10 | ALAS2023-2026-1549 | Apr 13, 2026 |
| libwinpr-debuginfo · amzn 2023 | 2:3.6.3-1.amzn2023.0.10 | ALAS2023-2026-1549 | Apr 13, 2026 |
| libwinpr-devel · amzn 2023 | 2:3.6.3-1.amzn2023.0.10 | ALAS2023-2026-1549 | Apr 13, 2026 |
| libwinpr-tools3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libwinpr-tools3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| libwinpr3-3 · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | libwinpr3-3 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
| winpr3-utils · Ubuntu 24.04.5 LTS (noble) | 3.30.0+dfsg-0ubuntu0.24.04.1 | winpr3-utils 3.30.0+dfsg-0ubuntu0.24.04.1 | Jul 23, 2026 |
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