CVE-2026-91948

A flaw was found in FreeRDP. An authenticated client can send specially crafted, oversized messages to the server when the CHANNELOPTIONSHOWPROTOCOL feature is active. This can cause a buffer underflow, leading to corruption of memory and potentially allowing an attacker to execute malicious code...

CVE-2026-91948 FreeRDP before 3.31.0 Out-of-bounds Write via SHOW_PROTOCOL

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

CVE-2026-91948: Integer Underflow (Wrap or Wraparound)

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