neigh: let neigh_xmit take skb ownership_CVE-2026-52981

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nneigh: let neigh_xmit take skb ownership\n\nneigh_xmit always releases the skb, except when no neighbour table is\nfound. But even the first added user of neigh_xmit (mpls) relied on\nneigh_xmit to release the skb (or queue it for tx).\n\nsashiko reported:\n If neigh_xmit() is called with an uninitialized neighbor table (for\n example, NEIGH_ND_TABLE when IPv6 is disabled), it returns -EAFNOSUPPORT\n and bypasses its internal out_kfree_skb error path.  Because the return\n value of neigh_xmit() is ignored here, does this leak the SKB?\n\nAssume full ownership and remove the last code path that doesn't\nxmit or free skb.",
    "published": "2026-06-24T16:28:57.074Z",
    "modified": "2026-06-28T06:37:33.379Z",
    "type": "cve",
    "title": "neigh: let neigh_xmit take skb ownership",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/8a89054a1ec0767aec25ed2bbac933da6ba3cf5a\nhttps://git.kernel.org/stable/c/9247d59ca15bf60a57dca08103f055d8a4340877\nhttps://git.kernel.org/stable/c/0084712e0bee204b284510cdb63182fd5a30c2b7\nhttps://git.kernel.org/stable/c/63063ba60d2dc334e34f1e3f9271d7f3f6f30307\nhttps://git.kernel.org/stable/c/445e45a2c3a078316a62d2d331a570cf34ef5079\nhttps://git.kernel.org/stable/c/4438113be604ee67a7bf4f81da6e1cca41332ce4",
    "id": "CVE-2026-52981",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux 4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\nLinux Linux 4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\nLinux Linux 4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\nLinux Linux 4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\nLinux Linux 4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\nLinux Linux 4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62\nLinux Linux 4.1",
    "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": "4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}