Use After Free Affecting libwebsockets package, versions *


Severity

Recommended
0.0
low
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.41% (35th percentile)

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  • Snyk IDSNYK-RHEL8-LIBWEBSOCKETS-13650243
  • published21 Oct 2025
  • disclosed20 Oct 2025

Introduced: 20 Oct 2025

CVE-2025-11677  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:8 libwebsockets.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libwebsockets package and not the libwebsockets package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1