CVE-2021-28135

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    CVE-2021-28135

    Published: 7 Sept 2021Last Modified: 7 Aug 2026

    Summary:

    Details: 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: https://dl.packetstormsecurity.net/papers/general/braktooth.pdf, https://www.espressif.com/en/products/socs/esp32, https://github.com/espressif/esp-idf, https://github.com/espressif/esp32-bt-lib

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    v4.4-dev

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-28135 | CVE-DB