CVE-2026-46140 (GCVE-0-2026-46140)
Vulnerability from cvelistv5
Published
2026-05-28 09:35
Modified
2026-07-04 11:50
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btmtk: validate WMT event SKB length before struct access btmtk_usb_hci_wmt_sync() casts the WMT event response SKB data to struct btmtk_hci_wmt_evt (7 bytes) and struct btmtk_hci_wmt_evt_funcc (9 bytes) without first checking that the SKB contains enough data. A short firmware response causes out-of-bounds reads from SKB tailroom. Use skb_pull_data() to validate and advance past the base WMT event header. For the FUNC_CTRL case, pull the additional status field bytes before accessing them.
References
Impacted products
Vendor Product Version
Linux Linux Version: f0457842215438786e2e205ad06a4fbb8ab63cd0
Version: d019930b0049fc2648a6b279893d8ad330596e81
Version: d019930b0049fc2648a6b279893d8ad330596e81
Version: d019930b0049fc2648a6b279893d8ad330596e81
Version: d019930b0049fc2648a6b279893d8ad330596e81
Version: 6.6.142   ≤
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
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          "programFiles": [
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              "version": "7.1",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btmtk: validate WMT event SKB length before struct access\n\nbtmtk_usb_hci_wmt_sync() casts the WMT event response SKB data to\nstruct btmtk_hci_wmt_evt (7 bytes) and struct btmtk_hci_wmt_evt_funcc\n(9 bytes) without first checking that the SKB contains enough data.\nA short firmware response causes out-of-bounds reads from SKB tailroom.\n\nUse skb_pull_data() to validate and advance past the base WMT event\nheader. For the FUNC_CTRL case, pull the additional status field bytes\nbefore accessing them."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-04T11:50:42.029Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/36c85f7029484d5ede769f8873d16e9c8e35533c"
        },
        {
          "url": "https://git.kernel.org/stable/c/c411cf1bfde951cfa821809cf4020ba177f76e0c"
        },
        {
          "url": "https://git.kernel.org/stable/c/624fb79dadc1b65757986a9d0fdde5c0cf3fe179"
        },
        {
          "url": "https://git.kernel.org/stable/c/70d37a8b9229e394cc17ddad47e90b81d80fcd09"
        },
        {
          "url": "https://git.kernel.org/stable/c/634a4408c0615c523cf7531790f4f14a422b9206"
        }
      ],
      "title": "Bluetooth: btmtk: validate WMT event SKB length before struct access",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46140",
    "datePublished": "2026-05-28T09:35:56.104Z",
    "dateReserved": "2026-05-13T15:03:33.100Z",
    "dateUpdated": "2026-07-04T11:50:42.029Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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