CVE-2026-33977
Published: Mar 30, 2026
Modified: Mar 31, 2026
Description
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.
| Vendor | Product | Versions |
|---|---|---|
FreeRDP | FreeRDP | affected < 3.24.2 |
Weaknesses (CWE)
References
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