net/ipv6: ioam6: prevent schema length wraparound in trace fill_CVE-2026-43341

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/ipv6: ioam6: prevent schema length wraparound in trace fill\n\nioam6_fill_trace_data() stores the schema contribution to the trace\nlength in a u8. With bit 22 enabled and the largest schema payload,\nsclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the\nremaining-space check. __ioam6_fill_trace_data() then positions the\nwrite cursor without reserving the schema area but still copies the\n4-byte schema header and the full schema payload, overrunning the trace\nbuffer.\n\nKeep sclen in an unsigned int so the remaining-space check and the write\ncursor calculation both see the full schema length.",
    "published": "2026-05-08T13:37:19.256Z",
    "modified": "2026-05-11T06:33:26.540Z",
    "type": "cve",
    "title": "net/ipv6: ioam6: prevent schema length wraparound in trace fill",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/e96d48b37708d53cbdc47f6f60b0714fc4a5f596\nhttps://git.kernel.org/stable/c/d1b041080086e91d3733a5438a8c51ad5d3d8e09\nhttps://git.kernel.org/stable/c/77695a69baca9b99d95fad09fc78c2318736604f\nhttps://git.kernel.org/stable/c/184d2e9db27c0f76226b5cad16fe29510a5d2280\nhttps://git.kernel.org/stable/c/d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d\nhttps://git.kernel.org/stable/c/5e67ba9bb531e1ec6599a82a065dea9040b9ce50",
    "id": "CVE-2026-43341",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 8c6f6fa6772696be0c047a711858084b38763728\nLinux Linux 8c6f6fa6772696be0c047a711858084b38763728\nLinux Linux 8c6f6fa6772696be0c047a711858084b38763728\nLinux Linux 8c6f6fa6772696be0c047a711858084b38763728\nLinux Linux 8c6f6fa6772696be0c047a711858084b38763728\nLinux Linux 8c6f6fa6772696be0c047a711858084b38763728\nLinux Linux 5.15",
    "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": "8c6f6fa6772696be0c047a711858084b38763728",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}