{"schemaVersion":3,"id":"CVE-2026-33977","aliases":["UBUNTU-CVE-2026-33977","DEBIAN-CVE-2026-33977"],"status":"published","duplicateOf":null,"title":null,"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. 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