ipv4: icmp: fix null-ptr-deref in icmp_build_probe()_CVE-2026-43099

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: icmp: fix null-ptr-deref in icmp_build_probe()\n\nipv6_stub->ipv6_dev_find() may return ERR_PTR(-EAFNOSUPPORT) when the\nIPv6 stack is not active (CONFIG_IPV6=m and not loaded), and passing\nthis error pointer to dev_hold() will cause a kernel crash with\nnull-ptr-deref.\n\nInstead, silently discard the request. RFC 8335 does not appear to\ndefine a specific response for the case where an IPv6 interface\nidentifier is syntactically valid but the implementation cannot perform\nthe lookup at runtime, and silently dropping the request may safer than\nmisreporting \"No Such Interface\".",
    "published": "2026-05-06T07:40:29.567Z",
    "modified": "2026-05-08T12:40:31.371Z",
    "type": "cve",
    "title": "ipv4: icmp: fix null-ptr-deref in icmp_build_probe()",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/47a8bf52156ac7e7a581eca31c1f964ba4258d4d\nhttps://git.kernel.org/stable/c/6be325206850a0891896d38bcf83a09d8b54ec48\nhttps://git.kernel.org/stable/c/f91b3ed9e7fa82a70511b5f6901c88379acf2964\nhttps://git.kernel.org/stable/c/5b9911582d441f72fe6ccb15ffe3303bbc07f6f5\nhttps://git.kernel.org/stable/c/fde29fd9349327acc50d19a0b5f3d5a6c964dfd8",
    "id": "CVE-2026-43099",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux d329ea5bd8845f0b196bf41b18b6173340d6e0e4\nLinux Linux d329ea5bd8845f0b196bf41b18b6173340d6e0e4\nLinux Linux d329ea5bd8845f0b196bf41b18b6173340d6e0e4\nLinux Linux d329ea5bd8845f0b196bf41b18b6173340d6e0e4\nLinux Linux d329ea5bd8845f0b196bf41b18b6173340d6e0e4\nLinux Linux 5.13",
    "sourceHref": "",
    "cvss": {
        "score": 7.5,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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": "",
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            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}