{"id":"CVE-2020-13594","aliases":["EUVD-2020-5841","GHSA-wj5v-mx63-894g"],"status":"published","title":"The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.2 and earlier ...","description":"The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.2 and earlier (for ESP32 devices) does not properly restrict the channel map field of the connection request packet on reception, allowing attackers in radio range to cause a denial of service (crash) via a crafted packet.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.0082,"percentile":0.57564,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2020-08-31T14:58:25Z","modified":"2026-10-24T10:30:17Z","products":[{"vendor":"espressif","product":"esp-idf"}],"references":[{"url":"https://asset-group.github.io/disclosures/sweyntooth/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://asset-group.github.io/cves.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/espressif/esp32-bt-lib","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-13594"},{"url":"https://github.com/advisories/GHSA-wj5v-mx63-894g"}],"sources":{"cve":[{"id":"CVE-2020-13594","description":"The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.2 and earlier (for ESP32 devices) does not properly restrict the channel map field of the connection request packet on reception, allowing attackers in radio range to cause a denial of service (crash) via a crafted packet.","status":"published","published":"2020-08-31T14:58:25Z","modified":"2024-08-04T12:25:16.208Z","updated_at":"2026-11-02T14:35:54.170199Z"}],"euvd":[{"id":"EUVD-2020-5841","description":"The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.2 and earlier (for ESP32 devices) does not properly restrict the channel map field of the connection request packet on reception, allowing attackers in radio range to cause a denial of service (crash) via a crafted packet.","status":"published","published":"2020-08-31T14:58:25Z","modified":"2024-08-04T12:25:16Z","updated_at":"2026-11-03T03:07:36.6695Z"}],"ghsa":[{"id":"GHSA-wj5v-mx63-894g","title":"The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.2 and earlier ...","description":"The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.2 and earlier (for ESP32 devices) does not properly restrict the channel map field of the connection request packet on reception, allowing attackers in radio range to cause a denial of service (crash) via a crafted packet.","status":"published","published":"2022-05-24T17:26:59Z","modified":"2023-01-29T05:03:54Z","updated_at":"2026-11-02T14:45:25.585599Z"}],"nvd":[{"id":"CVE-2020-13594","description":"The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.2 and earlier (for ESP32 devices) does not properly restrict the channel map field of the connection request packet on reception, allowing attackers in radio range to cause a denial of service (crash) via a crafted packet.","status":"published","published":"2020-08-31T15:15:10.633Z","modified":"2026-06-17T02:53:25.543Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":3.3,"vector":"AV:A/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:06:13.600965Z"}],"osv":[{"id":"CVE-2020-13594","description":"The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.2 and earlier (for ESP32 devices) does not properly restrict the channel map field of the connection request packet on reception, allowing attackers in radio range to cause a denial of service (crash) via a crafted packet.","status":"published","published":"2020-08-31T15:15:10.633Z","modified":"2026-10-24T10:30:17.255225065Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:14.418339Z"}]}}