Out-of-bounds Read in libwebsockets PNG parsing_CVE-2025-11679

5.9 / 10

MEDIUM

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

Description

Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read 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 height dimension.

Basic Information

ID CVE-2025-11679

Source Nozomi

Published Oct 20, 2025 at 13:58

Modified Oct 20, 2025 at 14:03

Affected Product

Vendor warmcat

Product libwebsockets

Version 4.0

Affected Versions warmcat libwebsockets 4.0
warmcat libwebsockets 4.0

CWE Classification

CWE-125

References

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    "description": "Out-of-bounds Read in lws_upng_emit_next_line in warmcat libwebsockets allows, when the LWS_WITH_UPNG flag is enabled during compilation and the HTML display stack is used, to read 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 height dimension.",
    "published": "2025-10-20T13:58:31.286Z",
    "modified": "2025-10-20T14:03:41.592Z",
    "type": "cve",
    "title": "Out-of-bounds Read in libwebsockets PNG parsing",
    "source": "Nozomi",
    "references": "https://libwebsockets.org/git/libwebsockets/commit?id=7df24cca7144d7bc9233b6b0a71108bd154ce101\nhttps://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11679",
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    "sourceData": "warmcat libwebsockets 4.0\nwarmcat libwebsockets 4.0",
    "sourceHref": "",
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        "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",
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