libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply()_CVE-2026-46024

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply()\n\nIf a message of type CEPH_MSG_AUTH_REPLY contains a zero value for both\nprotocol and result, this is currently not treated as an error. In case\nof ac->negotiating == true and ac->protocol > 0, this leads to setting\nac->protocol = 0 and ac->ops = NULL. Thereafter, the check for\nac->protocol != protocol returns false, and init_protocol() is not\ncalled. Subsequently, ac->ops->handle_reply() is called, which leads to\na null pointer dereference, because ac->ops is still NULL.\n\nThis patch changes the check for ac->protocol != protocol to\n!ac->protocol, as this also includes the case when the protocol was set\nto zero in the message. This causes the message to be treated as\ncontaining a bad auth protocol.",
    "published": "2026-05-27T12:56:29.932Z",
    "modified": "2026-05-30T10:46:42.128Z",
    "type": "cve",
    "title": "libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply()",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/4b2738b93edad661178340239de657d876b73d3d\nhttps://git.kernel.org/stable/c/927e4bd5692f2a4901808822981fb2c8d4456548\nhttps://git.kernel.org/stable/c/016bc663657366d386993f63eb31072eb45a2b77\nhttps://git.kernel.org/stable/c/8f2be7285941a33a9f72579a23b96392f83c758e\nhttps://git.kernel.org/stable/c/5199c125d25aeae8615c4fc31652cc0fe624338e",
    "id": "CVE-2026-46024",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\nLinux Linux 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\nLinux Linux 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\nLinux Linux 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\nLinux Linux 4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc\nLinux Linux 2.6.34",
    "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": "",
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            "confidentialityImpact": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "4e7a5dcd1bbab6560fbc8ada29a840e7a20ed7bc",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}