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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2025-11677

Use After Free in libwebsockets WebSocket server

Description

Use After Free in WebSocket server implementation in lws_handshake_server in warmcat libwebsockets may allow an attacker, in specific configurations where the user provides a callback function that handles LWS_CALLBACK_HTTP_CONFIRM_UPGRADE, to achieve denial of service.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

warmcat libwebsockets

Default version status: unaffected

  • 3 to ≤ 4.4.1,4.3.6affected

References