netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case_CVE-2026-23456

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case\n\nIn decode_int(), the CONS case calls get_bits(bs, 2) to read a length\nvalue, then calls get_uint(bs, len) without checking that len bytes\nremain in the buffer. The existing boundary check only validates the\n2 bits for get_bits(), not the subsequent 1-4 bytes that get_uint()\nreads. This allows a malformed H.323/RAS packet to cause a 1-4 byte\nslab-out-of-bounds read.\n\nAdd a boundary check for len bytes after get_bits() and before\nget_uint().",
    "published": "2026-04-03T15:15:37.534Z",
    "modified": "2026-04-27T14:02:34.715Z",
    "type": "cve",
    "title": "netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/a2cd54b9348e485d338b3c132338a4410c99afaf\nhttps://git.kernel.org/stable/c/c95dc674ebf01ecfb40388b6facfc89b81fed3b7\nhttps://git.kernel.org/stable/c/41b417ff73a24b2c68134992cc44c88db27f482d\nhttps://git.kernel.org/stable/c/52235bf88159a1ef16434ab49e47e99c8a09ab20\nhttps://git.kernel.org/stable/c/774a434f8c9c8602a976b2536f65d0172a07f4d2\nhttps://git.kernel.org/stable/c/6bce72daeccca9aa1746e92d6c3d4784e71f2ebb\nhttps://git.kernel.org/stable/c/fb6c3596823ec5dd09c2123340330d7448f51a59\nhttps://git.kernel.org/stable/c/1e3a3593162c96e8a8de48b1e14f60c3b57fca8a",
    "id": "CVE-2026-23456",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 5e35941d990123f155b02d5663e51a24f816b6f3\nLinux Linux 5e35941d990123f155b02d5663e51a24f816b6f3\nLinux Linux 5e35941d990123f155b02d5663e51a24f816b6f3\nLinux Linux 5e35941d990123f155b02d5663e51a24f816b6f3\nLinux Linux 5e35941d990123f155b02d5663e51a24f816b6f3\nLinux Linux 5e35941d990123f155b02d5663e51a24f816b6f3\nLinux Linux 5e35941d990123f155b02d5663e51a24f816b6f3\nLinux Linux 5e35941d990123f155b02d5663e51a24f816b6f3\nLinux Linux 2.6.17",
    "sourceHref": "",
    "cvss": {
        "score": 8.2,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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            "privilegesRequired": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}