openvswitch: defer tunnel netdev_put to RCU release_CVE-2026-31678

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: defer tunnel netdev_put to RCU release\n\novs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already\ndetached the device. Dropping the netdev reference in destroy can race\nwith concurrent readers that still observe vport->dev.\n\nDo not release vport->dev in ovs_netdev_tunnel_destroy(). Instead, let\nvport_netdev_free() drop the reference from the RCU callback, matching\nthe non-tunnel destroy path and avoiding additional synchronization\nunder RTNL.",
    "published": "2026-04-25T08:46:54.476Z",
    "modified": "2026-04-27T14:04:58.596Z",
    "type": "cve",
    "title": "openvswitch: defer tunnel netdev_put to RCU release",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/9d56aced21fb9c104e8a3f3be9b21fbafe448ffc\nhttps://git.kernel.org/stable/c/42f0d3d81209654c08ffdde5a34b9b92d2645896\nhttps://git.kernel.org/stable/c/bbe7bd722bfaea36aab3da6cc60fb4a05c644643\nhttps://git.kernel.org/stable/c/98b726ab5e2a4811e27c28e4d041f75bba147eab\nhttps://git.kernel.org/stable/c/b8c56a3fc5d879c0928f207a756b0f067f06c6a8\nhttps://git.kernel.org/stable/c/6931d21f87bc6d657f145798fad0bf077b82486c",
    "id": "CVE-2026-31678",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux a9020fde67a6eb77f8130feff633189f99264db1\nLinux Linux a9020fde67a6eb77f8130feff633189f99264db1\nLinux Linux a9020fde67a6eb77f8130feff633189f99264db1\nLinux Linux a9020fde67a6eb77f8130feff633189f99264db1\nLinux Linux a9020fde67a6eb77f8130feff633189f99264db1\nLinux Linux a9020fde67a6eb77f8130feff633189f99264db1\nLinux Linux 4.3",
    "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": "a9020fde67a6eb77f8130feff633189f99264db1",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}