Description
The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly handle the reception of multiple LMP IO Capability Request packets during the pairing process, allowing attackers in radio range to trigger memory corruption (and consequently a crash) in ESP32 via a replayed (duplicated) LMP packet.
Metrics
CVSS 3.1 6.5/10
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
References
- https://dl.packetstormsecurity.net/papers/general/braktooth.pdfTechnical Description, Third Party Advisory
- https://github.com/espressif/esp-idfProduct, Third Party Advisory
- https://github.com/espressif/esp32-bt-libProduct, Third Party Advisory
- https://www.espressif.com/en/products/socs/esp32Product, Vendor Advisory
- https://dl.packetstormsecurity.net/papers/general/braktooth.pdfTechnical Description, Third Party Advisory
- https://github.com/espressif/esp-idfProduct, Third Party Advisory
- https://github.com/espressif/esp32-bt-libProduct, Third Party Advisory
- https://www.espressif.com/en/products/socs/esp32Product, Vendor Advisory
Timeline
- Published
- Sep 7, 2021
- Last modified
- Jun 17, 2026
- NVD status
- Modified