PT-2025-42762 · Unknown+1 · Libwebsockets+1

Published 2025-10-20 · Updated 2025-10-20 · CVE-2025-11679

Positive Technologies (AI Summary)

CVSS v4.0

5.9

Medium

Base vector

AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions libwebsockets (affected versions not specified)

Description An out-of-bounds read issue exists in the lws upng emit next line function within libwebsockets when the LWS WITH UPNG flag is enabled during compilation and the HTML display stack is utilized. This condition can occur when a user visits a website containing a specially crafted PNG file with a large height dimension, potentially leading to a crash due to reading past a heap-allocated buffer.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2025-11679

Affected Products

Debian

Libwebsockets

References · 11

• https://osv.dev/vulnerability/UBUNTU-CVE-2025-11679 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-11679 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-11679 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-11679 · Security Note
• https://ubuntu.com/security/CVE-2025-11679 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-11679 · Vendor Advisory
• https://libwebsockets.org/git/libwebsockets/commit?id=7df24cca7144d7bc9233b6b0a71108bd154ce101 · Patch, Vendor Advisory
• https://t.me/cveNotify/139388 · Telegram Post
• https://nozominetworks.com/labs/vulnerability-advisories-cve-2025-11679 · Note
• https://twitter.com/CVEnew/status/1980276702455500896 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1980286199622234227 · Twitter Post