mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()_CVE-2026-43274

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()\n\nThe cluster_cfg array is dynamically allocated to hold per-CPU\nconfiguration structures, with its size based on the number of online\nCPUs. Previously, this array was indexed using hartid, which may be\nnon-contiguous or exceed the bounds of the array, leading to\nout-of-bounds access.\nSwitch to using cpuid as the index, as it is guaranteed to be within\nthe valid range provided by for_each_online_cpu().",
    "published": "2026-05-06T11:28:57.503Z",
    "modified": "2026-05-08T12:41:42.166Z",
    "type": "cve",
    "title": "mailbox: mchp-ipc-sbi: fix out-of-bounds access in mchp_ipc_get_cluster_aggr_irq()",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/95438699c92947155823dcd3918049a07f3cd867\nhttps://git.kernel.org/stable/c/0442b6229e2eedc95a6d3d18ce75dec7f5b5377c\nhttps://git.kernel.org/stable/c/f7c330a8c83c9b0332fd524097eaf3e69148164d",
    "id": "CVE-2026-43274",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux e4b1d67e71419c4af581890ecea84b04920d4116\nLinux Linux e4b1d67e71419c4af581890ecea84b04920d4116\nLinux Linux e4b1d67e71419c4af581890ecea84b04920d4116\nLinux Linux 6.14",
    "sourceHref": "",
    "cvss": {
        "score": 8.4,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/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": "",
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            "baseScore": 0,
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            "privilegesRequired": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "e4b1d67e71419c4af581890ecea84b04920d4116",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
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    "ai_score": 0
}