CVE-2022-40480Public exploit

Bluetooth service interruption via zero-timeout ConReq

Published Feb 7, 2023 · Updated Mar 25, 2025

Denial of service in Nordic nRF5340-DK and Microchip DT100112 allows physically proximate attackers to disable Bluetooth via a crafted ConReq packet. The BLE link-layer handler accepts a connection request whose timeout field is zero instead of rejecting the invalid parameter, leaving the device unresponsive. The attacker must be within BLE radio range; recovery requires manually restarting Bluetooth and, in some cases, the device.

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

What happened

Denial of service in Nordic nRF5340-DK and Microchip DT100112 allows physically proximate attackers to disable Bluetooth via a crafted ConReq packet. The BLE link-layer handler accepts a connection request whose timeout field is zero instead of rejecting the invalid parameter, leaving the device unresponsive. The attacker must be within BLE radio range; recovery requires manually restarting Bluetooth and, in some cases, the device.

The record

CVE
CVE-2022-40480
Published
Feb 7, 2023
Updated
Mar 25, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5CISA-ADPCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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