CVE-2020-10069

Service interruption via invalid Bluetooth connection parameters

Published May 24, 2021 · Updated Sep 16, 2024

Improper parameter handling in Zephyr RTOS 1.14.2 and 2.2.0 allows physically proximate attackers to interrupt service via Bluetooth. The Bluetooth controller accepts an invalid channel map or hop increment in a CONNECT_IND PDU, so a zero channel count reaches an assertion or division operation. An unauthenticated peer within Bluetooth radio range can trigger an assertion failure or divide-by-zero fault, interrupting the affected device.

CVSS severity4.3
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper parameter handling in Zephyr RTOS 1.14.2 and 2.2.0 allows physically proximate attackers to interrupt service via Bluetooth. The Bluetooth controller accepts an invalid channel map or hop increment in a CONNECT_IND PDU, so a zero channel count reaches an assertion or division operation. An unauthenticated peer within Bluetooth radio range can trigger an assertion failure or divide-by-zero fault, interrupting the affected device.

The record

CVE
CVE-2020-10069
Published
May 24, 2021
Updated
Sep 16, 2024
Vendor
Zephyr Project
Product
Zephyr RTOS
Classifications
CWE-233, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 24, 2021CVE 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=v1.14.2 <unspecified
  2. Affected versionversion=v2.2.0 <unspecified

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Zephyr Project · Zephyr RTOSversion=v1.14.2 <unspecified; version=v2.2.0 <unspecified

Published CVSS scores

4.3GitHub Security AdvisoryCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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-233Improper Handling of Parameters
T1499Endpoint Denial of Service

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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