Out-of-bounds Write in unfilter_scanline in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big width value that causes an integer overflow which value is used for determining the size of a heap allocation.
History

Tue, 21 Oct 2025 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L'}

threat_severity

Low


Tue, 21 Oct 2025 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Warmcat
Warmcat libwebsockets
Vendors & Products Warmcat
Warmcat libwebsockets

Mon, 20 Oct 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 20 Oct 2025 14:15:00 +0000

Type Values Removed Values Added
Description Out-of-bounds Write in unfilter_scanline in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to write past a heap allocated buffer possibly causing a crash, when the user visits an attacker controlled website that contains a crafted PNG file with a big width value that causes an integer overflow which value is used for determining the size of a heap allocation.
Title Out-of-bounds Write in libwebsockets PNG parsing
Weaknesses CWE-787
References
Metrics cvssV4_0

{'score': 5.9, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Nozomi

Published: 2025-10-20T14:04:06.854Z

Updated: 2025-10-20T14:34:57.848Z

Reserved: 2025-10-13T09:57:01.900Z

Link: CVE-2025-11680

cve-icon Vulnrichment

Updated: 2025-10-20T14:34:50.372Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-20T14:15:40.520

Modified: 2025-10-21T19:31:25.450

Link: CVE-2025-11680

cve-icon Redhat

Severity : Low

Publid Date: 2025-10-20T14:04:06Z

Links: CVE-2025-11680 - Bugzilla