CVE-2020-10068

Service interruption via duplicate Bluetooth DLE requests

Published Jun 5, 2020 · Updated Sep 16, 2024

Improper input validation in Zephyr RTOS 1.14.0 and later allows attackers to interrupt service via malformed Bluetooth DLE traffic. The Bluetooth controller's DLE state machine accepts a second LL_LENGTH_REQ in the same connection interval before its response is acknowledged and mishandles the duplicate. An established Bluetooth Low Energy connection and precisely timed duplicate requests are required; the resulting incorrect controller state interrupts Bluetooth service.

CVSS severity6.5
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Zephyr RTOS 1.14.0 and later allows attackers to interrupt service via malformed Bluetooth DLE traffic. The Bluetooth controller's DLE state machine accepts a second LL_LENGTH_REQ in the same connection interval before its response is acknowledged and mishandles the duplicate. An established Bluetooth Low Energy connection and precisely timed duplicate requests are required; the resulting incorrect controller state interrupts Bluetooth service.

The record

CVE
CVE-2020-10068
Published
Jun 5, 2020
Updated
Sep 16, 2024
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
CWE-20, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 5, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.14.0 <unspecified
  2. Affected versionversion=2.2.0 <unspecified

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Zephyr Project · Zephyr RTOSversion=1.14.0 <unspecified; version=2.2.0 <unspecified

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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