CVE-2021-28139

The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly restrict the Feature Page upon reception of an LMP Feature Response Extended packet, allowing attackers in radio range to trigger arbitrary code execution in ESP32 via a crafted Extended Features bitfield payload.

• 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

Published

Sep 7, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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