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.
Advisories

No advisories yet.

Fixes

Solution

Update the library to its latest stable release, if not possible backport the fix commit 2b715249f39291c86443b969a1088d59b6a89b78


Workaround

No workaround given by the vendor.

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:

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

cve-icon OpenCVE Enrichment

Updated: 2025-10-21T09:39:52Z