CVE-2021-28135

MEDIUM

Espressif ESP-IDF < 4.4 - Denial of Service via Bluetooth Classic LMP Feature Response Flood

Title source: llm
STIX 2.1

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.

References (4)

Core 4
Core References
Third Party Advisory x_refsource_misc
https://github.com/espressif/esp-idf

Scores

CVSS v3 6.5
EPSS 0.0079
EPSS Percentile 51.8%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (1)
espressif/esp-idf < 4.4
Published Sep 07, 2021
Tracked Since Feb 18, 2026