CVE-2022-46399Public exploit

Bluetooth service interruption via zero-timeout connection request

Published Dec 19, 2022 · Updated Apr 17, 2025

Denial of service in Microchip RN4870 1.43 and PIC LightBlue Explorer Demo 4.2 DT100112 allows physically proximate attackers to disable Bluetooth. The BLE link-layer implementation accepts a connection request whose supervision-timeout field is zero instead of rejecting or ignoring the invalid value, then becomes unresponsive and turns Bluetooth off. Radio-range access is sufficient without pairing or user interaction, and recovery requires manually restarting Bluetooth or, in some cases, the affected device.

CVSS severity7.5
High
EPSS probability0.75%
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 Microchip RN4870 1.43 and PIC LightBlue Explorer Demo 4.2 DT100112 allows physically proximate attackers to disable Bluetooth. The BLE link-layer implementation accepts a connection request whose supervision-timeout field is zero instead of rejecting or ignoring the invalid value, then becomes unresponsive and turns Bluetooth off. Radio-range access is sufficient without pairing or user interaction, and recovery requires manually restarting Bluetooth or, in some cases, the affected device.

The record

CVE
CVE-2022-46399
Published
Dec 19, 2022
Updated
Apr 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 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

7.5CISA-ADPCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/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 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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