#VU117947 Use-after-free in libwebsockets - CVE-2025-11677

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Main Vulnerability Database Vulnerabilities #VU117947

#VU117947 Use-after-free in libwebsockets - CVE-2025-11677

Published: November 3, 2025


Vulnerability identifier: #VU117947
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-11677
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
libwebsockets
Software vendor:
libwebsockets.org

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a use-after-free error within the lws_handshake_server() function in lib/roles/http/server/server.c. A remote attacker can send specially crafted data to the application and perform a denial of service attack.



Remediation

Install updates from vendor's website.

External links