CVE-2026-46140 (GCVE-0-2026-46140)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:35 – Updated: 2026-05-28 09:35
VLAI
Title
Bluetooth: btmtk: validate WMT event SKB length before struct access
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d019930b0049fc2648a6b279893d8ad330596e81 , < c411cf1bfde951cfa821809cf4020ba177f76e0c (git)
Affected: d019930b0049fc2648a6b279893d8ad330596e81 , < 624fb79dadc1b65757986a9d0fdde5c0cf3fe179 (git)
Affected: d019930b0049fc2648a6b279893d8ad330596e81 , < 70d37a8b9229e394cc17ddad47e90b81d80fcd09 (git)
Affected: d019930b0049fc2648a6b279893d8ad330596e81 , < 634a4408c0615c523cf7531790f4f14a422b9206 (git)
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Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.88 , ≤ 6.12.* (semver)
Unaffected: 6.18.30 , ≤ 6.18.* (semver)
Unaffected: 7.0.7 , ≤ 7.0.* (semver)
Unaffected: 7.1-rc3 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/btmtk.c"
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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": "2026-05-28T09:35:56.104Z",
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        "shortName": "Linux"
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    "cveId": "CVE-2026-46140",
    "datePublished": "2026-05-28T09:35:56.104Z",
    "dateReserved": "2026-05-13T15:03:33.100Z",
    "dateUpdated": "2026-05-28T09:35:56.104Z",
    "state": "PUBLISHED"
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      "date": "2026-05-29",
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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