Bluetooth: MGMT: validate mesh send advertising payload length

{
  "id": "85aff60d8a82392fa2a65c49ab51ad09378640b2d56563f75fc4f2bfa6e77813",
  "url": "https://osv.dev/vulnerability/CVE-2026-43017",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bluetooth: MGMT: validate mesh send advertising payload length",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: validate mesh send advertising payload length mesh_send() currently bounds MGMT_OP_MESH_SEND by total command length, but it never verifies that the bytes supplied for the flexible adv_data[] array actually match the embedded adv_data_len field. MGMT_MESH_SEND_SIZE only covers the fixed header, so a truncated command can still pass the existing 20..50 byte range check and later drive the async mesh send path past the end of the queued command buffer. Keep rejecting zero-length and oversized advertising payloads, but validate adv_data_len explicitly and require the command length to exactly match the flexible array size before queueing the request.",
    "evidence": "osv:CVE-2026-43017",
    "products": [
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        "name": {
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          "evidence": "/affected/1/package/name"
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        "prerequisites": [],
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            "value": "6.1.168",
            "evidence": "/affected/1/ranges"
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            "value": "6.6.134",
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            "value": "6.18.22",
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    "severity": "unknown",
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      "id": "CVE-2026-43017",
      "aliases": [
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      ],
      "modified": "2026-10-28T02:30:24.389790963Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0b706fb2294aff3adfd54653bda1b5e356ad4566",
        "https://git.kernel.org/stable/c/244b639e6a3a8e26241e201004a3a9f764476631",
        "https://git.kernel.org/stable/c/24fa32369cf15d8fc918bdfe94097b12e6acada0",
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        "https://git.kernel.org/stable/c/bda93eec78cdbfe5cda00785cefebd443e56b88b",
        "https://git.kernel.org/stable/c/edb5898cfa91afe7e8f83eda18d93034c953d632",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43017.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43017",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 490845,
  "published_at": "2026-05-01T14:15:21.561+00:00"
}