batman-adv: avoid OGM aggregation when skb tailroom is insufficient_CVE-2026-31683

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: avoid OGM aggregation when skb tailroom is insufficient\n\nWhen OGM aggregation state is toggled at runtime, an existing forwarded\npacket may have been allocated with only packet_len bytes, while a later\npacket can still be selected for aggregation. Appending in this case can\nhit skb_put overflow conditions.\n\nReject aggregation when the target skb tailroom cannot accommodate the new\npacket. The caller then falls back to creating a new forward packet\ninstead of appending.",
    "published": "2026-04-25T08:47:00.334Z",
    "modified": "2026-04-27T14:05:03.279Z",
    "type": "cve",
    "title": "batman-adv: avoid OGM aggregation when skb tailroom is insufficient",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/67176c96f325837b0bb3e9538ca2eba414f447d8\nhttps://git.kernel.org/stable/c/0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1\nhttps://git.kernel.org/stable/c/6755347c5f9bdd44dee80f692208b056fcd40a52\nhttps://git.kernel.org/stable/c/1ada20331f2df2a942d6b83ae1f04a304b642e2a\nhttps://git.kernel.org/stable/c/6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075\nhttps://git.kernel.org/stable/c/0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8\nhttps://git.kernel.org/stable/c/eda89a1bae0602aec8314ced299bb243b9f9aeef\nhttps://git.kernel.org/stable/c/0d4aef630be9d5f9c1227d07669c26c4383b5ad0",
    "id": "CVE-2026-31683",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux c6c8fea29769d998d94fcec9b9f14d4b52b349d3\nLinux Linux c6c8fea29769d998d94fcec9b9f14d4b52b349d3\nLinux Linux c6c8fea29769d998d94fcec9b9f14d4b52b349d3\nLinux Linux c6c8fea29769d998d94fcec9b9f14d4b52b349d3\nLinux Linux c6c8fea29769d998d94fcec9b9f14d4b52b349d3\nLinux Linux c6c8fea29769d998d94fcec9b9f14d4b52b349d3\nLinux Linux c6c8fea29769d998d94fcec9b9f14d4b52b349d3\nLinux Linux c6c8fea29769d998d94fcec9b9f14d4b52b349d3\nLinux Linux 2.6.38",
    "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": "",
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            "baseScore": 0,
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "c6c8fea29769d998d94fcec9b9f14d4b52b349d3",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}