CVE-2026-33977
Medium · 6.5CVSS
6.5
EPSS
0.4%
Published
Mar 30, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Tumbleweed | freerdp | 0 | 3.24.2-1.1 |
Related vulnerabilities
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- CVE-2026-44420 FreeRDP is a free implementation of the Remote Desktop Protocol. Also affects freerdp
- CVE-2026-44422 FreeRDP is a free implementation of the Remote Desktop Protocol. Also affects freerdp
- CVE-2026-44421 FreeRDP is a free implementation of the Remote Desktop Protocol. Also affects freerdp
- CVE-2026-40033 FreeRDP before 3.26.0 contains a heap-buffer-overflow vulnerability in gdi_CacheToSurface… Also affects freerdp
- CVE-2026-40254 FreeRDP is a free implementation of the Remote Desktop Protocol. Also affects freerdp
- CVE-2026-33995 FreeRDP is a free implementation of the Remote Desktop Protocol. Also affects freerdp
- CVE-2026-33987 FreeRDP is a free implementation of the Remote Desktop Protocol. Also affects freerdp