batman-adv: tp_meter: avoid use of uninit sender vars_CVE-2026-52931

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: tp_meter: avoid use of uninit sender vars\n\nbatadv_tp_recv_ack() and batadv_tp_stop() are only valid for tp_vars in the\nBATADV_TP_SENDER role. When called with a BATADV_TP_RECEIVER role, it\nproceeds to read sender-only members that were never initialized, leading\nto undefined behavior.\n\nThis can be triggered when a node that is currently acting as a receiver in\nan ongoing tp_meter session receives a malicious ACK packet.\n\nGuard against this by checking tp_vars->role immediately after the\nlookup and bailing out if it is not BATADV_TP_SENDER, before any of\nthose members are accessed.",
    "published": "2026-06-24T07:14:23.349Z",
    "modified": "2026-06-28T06:36:51.143Z",
    "type": "cve",
    "title": "batman-adv: tp_meter: avoid use of uninit sender vars",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/0e388af04b3958b178a1b979527f93eb46ea1fee\nhttps://git.kernel.org/stable/c/1a21c055f66e78973712a4a1be2a554f1ee2e4f4\nhttps://git.kernel.org/stable/c/9884c9c02d3c90e9215db3c5128f59045d20ae91\nhttps://git.kernel.org/stable/c/53f931e0146ae5bdab4cba302646827d06b3794b\nhttps://git.kernel.org/stable/c/ecdaa3e4d91040206afe21bc8a0d1198a0971ff3\nhttps://git.kernel.org/stable/c/dc2ae5fbd2dadc26735092f140b246841d969a11\nhttps://git.kernel.org/stable/c/85397e48afe6be83ffca5ad3f4792296bfc81d3d\nhttps://git.kernel.org/stable/c/6c65cf23d4c6170fcf5714c32aa64689718cb142",
    "id": "CVE-2026-52931",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 33a3bb4a3345bb511f9c69c913da95d4693e2a4e\nLinux Linux 33a3bb4a3345bb511f9c69c913da95d4693e2a4e\nLinux Linux 33a3bb4a3345bb511f9c69c913da95d4693e2a4e\nLinux Linux 33a3bb4a3345bb511f9c69c913da95d4693e2a4e\nLinux Linux 33a3bb4a3345bb511f9c69c913da95d4693e2a4e\nLinux Linux 33a3bb4a3345bb511f9c69c913da95d4693e2a4e\nLinux Linux 33a3bb4a3345bb511f9c69c913da95d4693e2a4e\nLinux Linux 33a3bb4a3345bb511f9c69c913da95d4693e2a4e\nLinux Linux 4.8",
    "sourceHref": "",
    "cvss": {
        "score": 9.8,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/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": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "33a3bb4a3345bb511f9c69c913da95d4693e2a4e",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}