{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-68298",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-68298"
  ],
  "published": "2025-12-16T15:06:57Z",
  "summary": "Bluetooth: btusb: mediatek: Avoid btusb_mtk_claim_iso_intf() NULL deref",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btusb: mediatek: Avoid btusb_mtk_claim_iso_intf() NULL deref\n\nIn btusb_mtk_setup(), we set `btmtk_data->isopkt_intf` to:\n  usb_ifnum_to_if(data->udev, MTK_ISO_IFNUM)\n\nThat function can return NULL in some cases. Even when it returns\nNULL, though, we still go on to call btusb_mtk_claim_iso_intf().\n\nAs of commit e9087e828827 (\"Bluetooth: btusb: mediatek: Add locks for\nusb_driver_claim_interface()\"), calling btusb_mtk_claim_iso_intf()\nwhen `btmtk_data->isopkt_intf` is NULL will cause a crash because\nwe'll end up passing a bad pointer to device_lock(). Prior to that\ncommit we'd pass the NULL pointer directly to\nusb_driver_claim_interface() which would detect it and return an\nerror, which was handled.\n\nResolve the crash in btusb_mtk_claim_iso_intf() by adding a NULL check\nat the start of the function. This makes the code handle a NULL\n`btmtk_data->isopkt_intf` the same way it did before the problematic\ncommit (just with a slight change to the error message printed).",
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-68298"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2fa09fe98ca3b114d66285f65f7e108fea131815"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c3b990e0b23068da65f0004cd38ee31f43f36460"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c884a0b27b4586e607431d86a1aa0bb4fb39169c"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-24T06:48:58Z"
  }
}