#VU117948 Stack-based buffer overflow in libwebsockets - CVE-2025-11678
Published: November 3, 2025
Vulnerability identifier: #VU117948
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-11678
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
libwebsockets
libwebsockets
Software vendor:
libwebsockets.org
libwebsockets.org
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the lws_adns_parse_label() function in lib/system/async-dns/async-dns-parse.c. A remote unauthenticated attacker can trigger a stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install updates from vendor's website.