CVE-2021-28135

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly handle the reception of continuous unsolicited LMP responses, allowing attackers in radio range to trigger a denial of service (crash) in ESP32 by flooding the target device with LMP Feature Response data.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://dl.packetstormsecurity.net/papers/general/braktooth.pdfBroken Link
https://github.com/espressif/esp-idfThird Party Advisory
https://github.com/espressif/esp32-bt-libThird Party Advisory
https://www.espressif.com/en/products/socs/esp32Product
https://dl.packetstormsecurity.net/papers/general/braktooth.pdfBroken Link
https://github.com/espressif/esp-idfThird Party Advisory
https://github.com/espressif/esp32-bt-libThird Party Advisory
https://www.espressif.com/en/products/socs/esp32Product

Timeline

Published: Sep 7, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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