rxrpc: only handle RESPONSE during service challenge_CVE-2026-31676

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: only handle RESPONSE during service challenge\n\nOnly process RESPONSE packets while the service connection is still in\nRXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before\nrunning response verification and security initialization, then use a local\nsecured flag to decide whether to queue the secured-connection work after\nthe state transition. This keeps duplicate or late RESPONSE packets from\nre-running the setup path and removes the unlocked post-transition state\ntest.",
    "published": "2026-04-25T08:46:52.285Z",
    "modified": "2026-04-27T14:04:57.519Z",
    "type": "cve",
    "title": "rxrpc: only handle RESPONSE during service challenge",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585\nhttps://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c\nhttps://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8\nhttps://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e\nhttps://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c",
    "id": "CVE-2026-31676",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 17926a79320afa9b95df6b977b40cca6d8713cea\nLinux Linux 17926a79320afa9b95df6b977b40cca6d8713cea\nLinux Linux 17926a79320afa9b95df6b977b40cca6d8713cea\nLinux Linux 17926a79320afa9b95df6b977b40cca6d8713cea\nLinux Linux 17926a79320afa9b95df6b977b40cca6d8713cea\nLinux Linux 2.6.22",
    "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": "17926a79320afa9b95df6b977b40cca6d8713cea",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
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    "ai_score": 0
}