#VU117946 Out-of-bounds read in libwebsockets - CVE-2025-11679
Published: November 3, 2025
Vulnerability identifier: #VU117946
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-11679
CWE-ID: CWE-125
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 gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition within the lws_upng_emit_next_line() function in lib/misc/upng.c. A remote attacker can trigger an out-of-bounds read error and read contents of memory on the system.
Remediation
Install updates from vendor's website.