sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing_CVE-2026-53246

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: validate cached peer INIT chunk length in COOKIE_ECHO processing\n\nWhen a listening SCTP server processes a COOKIE_ECHO chunk, the cached\npeer INIT chunk embedded after the cookie is parsed and its parameters\nare later walked by sctp_process_init() using sctp_walk_params().\n\nHowever, the chunk header length of this cached INIT chunk was not\nvalidated against the remaining buffer in the COOKIE_ECHO payload. If\nthe length field is inflated, the parameter walk can run beyond the\nactual received data, leading to out-of-bounds reads and potential\nmemory corruption during later parameter handling (e.g. STATE_COOKIE\nprocessing and kmemdup() copies).\n\nAdd a bounds check in sctp_unpack_cookie() to ensure the cached INIT\nchunk length does not exceed the available data in the COOKIE_ECHO\nbuffer before it is used.",
    "published": "2026-06-25T08:39:39.896Z",
    "modified": "2026-06-28T06:40:52.380Z",
    "type": "cve",
    "title": "sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/cc272185c9a9a4b7febc2de52eeaa3d00f19091e\nhttps://git.kernel.org/stable/c/edccbf3d63b0a3362bc916ea72edacc1e1ca456a\nhttps://git.kernel.org/stable/c/0861615c28de668669d748ef4eb913ea9262d13b",
    "id": "CVE-2026-53246",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\nLinux Linux 2.6.12",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
    "vendor": "Linux",
    "ai_description": "A vulnerability in the Linux kernel's SCTP implementation allows out-of-bounds reads and potential memory corruption during COOKIE_ECHO processing.",
    "ai_severity": "Critical",
    "ai_vendor": "The Linux Foundation",
    "ai_product": "Linux Kernel",
    "ai_version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 2.6.12",
    "ai_score": 9.8
}