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.
History

Tue, 21 Oct 2025 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Warmcat
Warmcat libwebsockets
Vendors & Products Warmcat
Warmcat libwebsockets

Tue, 21 Oct 2025 00:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}

threat_severity

Low


Mon, 20 Oct 2025 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 20 Oct 2025 14:00:00 +0000

Type Values Removed Values Added
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.
Title Use After Free in libwebsockets WebSocket server
Weaknesses CWE-416
References
Metrics cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Nozomi

Published:

Updated: 2025-10-20T13:54:19.569Z

Reserved: 2025-10-13T09:56:10.952Z

Link: CVE-2025-11677

cve-icon Vulnrichment

Updated: 2025-10-20T13:54:12.114Z

cve-icon NVD

Status : Received

Published: 2025-10-20T14:15:39.357

Modified: 2025-10-20T14:15:39.357

Link: CVE-2025-11677

cve-icon Redhat

Severity : Low

Publid Date: 2025-10-20T13:41:10Z

Links: CVE-2025-11677 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-10-21T09:39:46Z