smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available_CVE-2026-31539

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: smbdirect: introduce smbdirect_socket.recv_io.credits.available\n\nThe logic off managing recv credits by counting posted recv_io and\ngranted credits is racy.\n\nThat's because the peer might already consumed a credit,\nbut between receiving the incoming recv at the hardware\nand processing the completion in the 'recv_done' functions\nwe likely have a window where we grant credits, which\ndon't really exist.\n\nSo we better have a decicated counter for the\navailable credits, which will be incremented\nwhen we posted new recv buffers and drained when\nwe grant the credits to the peer.",
    "published": "2026-04-24T14:30:26.326Z",
    "modified": "2026-04-27T14:03:58.124Z",
    "type": "cve",
    "title": "smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/e811e60e1cc79923c4388146eb1fa26a7482731e\nhttps://git.kernel.org/stable/c/f99996870222b598914a1f49d7375dc23752c237\nhttps://git.kernel.org/stable/c/6e3c5052f9686192e178806e017b7377155f4bab",
    "id": "CVE-2026-31539",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 5fb9b459b3686e366640edd4e62805ef7b4de927\nLinux Linux 5fb9b459b3686e366640edd4e62805ef7b4de927\nLinux Linux 5fb9b459b3686e366640edd4e62805ef7b4de927\nLinux Linux 6.18",
    "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": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "5fb9b459b3686e366640edd4e62805ef7b4de927",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}