{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "2.9.0"
              }
            ]
          }
        ]
      }
    }
  ],
  "details": "The Bluetooth Classic implementation in the Cypress WICED BT stack through 2.9.0 for CYW20735B1 does not properly handle the reception of a malformed LMP timing accuracy response followed by multiple reconnections to the link slave, allowing attackers to exhaust device BT resources and eventually trigger a crash via multiple attempts of sending a crafted LMP timing accuracy response followed by a sudden reconnection with a random BDAddress.",
  "id": "CVE-2021-34147",
  "modified": "2026-03-13T21:49:09.198744264Z",
  "published": "2021-09-07T07:15:07.373Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://dl.packetstormsecurity.net/papers/general/braktooth.pdf"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.cypress.com/documentation/datasheets/cyw20735b1-single-chip-bluetooth-transceiver-wireless-input-devices"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}