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CVE-2020-13594

MEDIUM
6.5
CVSS Score
Published: August 31, 2020 at 02:58 PM UTC
Updated: June 17, 2026 at 02:53 AM UTC
2 products affected across 1 vendorEsp IdfEsp32

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.8%

Description

The Bluetooth Low Energy (BLE) controller implementation in Espressif ESP-IDF 4.2 and earlier (for ESP32 devices) does not properly restrict the channel map field of the connection request packet on reception, allowing attackers in radio range to cause a denial of service (crash) via a crafted packet.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Esp Idf· Espressif
95%
v ≤ 4.2
espressif-esp32 (environment)
Esp32· Espressifdevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://asset-group.github.io/cves.html
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://asset-group.github.io/disclosures/sweyntooth/
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/espressif/esp32-bt-lib

CVSS

6.5MEDIUM[email protected]
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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