io_uring/kbuf: check if target buffer list is still legacy on recycle_CVE-2026-43366

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/kbuf: check if target buffer list is still legacy on recycle\n\nThere's a gap between when the buffer was grabbed and when it\npotentially gets recycled, where if the list is empty, someone could've\nupgraded it to a ring provided type. This can happen if the request\nis forced via io-wq. The legacy recycling is missing checking if the\nbuffer_list still exists, and if it's of the correct type. Add those\nchecks.",
    "published": "2026-05-08T14:21:19.191Z",
    "modified": "2026-05-11T06:33:44.486Z",
    "type": "cve",
    "title": "io_uring/kbuf: check if target buffer list is still legacy on recycle",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/a7b33671e418fca507feebd1d56e7f4952a4b25c\nhttps://git.kernel.org/stable/c/439a6728ec4641ffad1ca796622c19bc525e570f\nhttps://git.kernel.org/stable/c/f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa\nhttps://git.kernel.org/stable/c/50ad880db3013c6fee0ef13781762a39e2e7ef83\nhttps://git.kernel.org/stable/c/97b57f69fee1b61b41acbf37e7720cac9d389fa4\nhttps://git.kernel.org/stable/c/c2c185be5c85d37215397c8e8781abf0a69bec1f",
    "id": "CVE-2026-43366",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\nLinux Linux c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\nLinux Linux c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\nLinux Linux c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\nLinux Linux c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\nLinux Linux c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\nLinux Linux 5.19",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/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": "c7fb19428d67dd0a2a78a4f237af01d39c78dc5a",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}