CVE-2026-91948 [HIGH] – FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in server-side

FreeRDP versions before 3.31.0 contain an out-of-bounds write vulnerability in server-side static virtual channel handling when CHANNEL_OPTION_SHOW_PROTOCOL is enabled. Authenticated clients can queue oversized channel messages that cause buffer underflow and corrupt heap memory including live pointers, potentially enabling code execution.