CVE-2022-41972

Device DoS via invalid BLE channel ID

Published Dec 16, 2022 · Updated Apr 17, 2025

NULL pointer dereference in Contiki-NG before 4.9 allows attackers to interrupt IoT devices via crafted Bluetooth Low Energy L2CAP packets. In input_l2cap_credit in os/net/mac/ble/ble-l2cap.c, a user-supplied channel ID is mapped without confirming that metadata exists, leaving channel NULL before dereference. An attacker able to inject BLE traffic in radio range can trigger undefined behavior and a device service interruption; confidentiality and integrity impact are not reported.

CVSS severity6.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Contiki-NG before 4.9 allows attackers to interrupt IoT devices via crafted Bluetooth Low Energy L2CAP packets. In input_l2cap_credit in os/net/mac/ble/ble-l2cap.c, a user-supplied channel ID is mapped without confirming that metadata exists, leaving channel NULL before dereference. An attacker able to inject BLE traffic in radio range can trigger undefined behavior and a device service interruption; confidentiality and integrity impact are not reported.

The record

CVE
CVE-2022-41972
Published
Dec 16, 2022
Updated
Apr 17, 2025
Vendor
Contiki-NG
Product
Contiki-NG
Classifications
CWE-476, T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 16, 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?

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

  1. Affected versionversion=<= 4.8

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Contiki-NG · Contiki-NGversion=<= 4.8

Published CVSS scores

2.9GitHub, Inc.CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
6.5NVDCVSS: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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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