CVE-2022-41873

Memory disclosure and corruption via truncated channel ID

Published Nov 11, 2022 · Updated Apr 23, 2025

Out-of-bounds access in Contiki-NG before 4.9 allows physically proximate attackers to read or write memory via a crafted BLE L2CAP channel ID. In get_channel_for_cid, an 8-bit temporary checks only the low byte of the 16-bit CID, but the full value is recomputed and used to index l2cap_channels. BLE proximity and a crafted L2CAP frame are required; the resulting pointer can expose adjacent memory or let input_l2cap_frame_flow_channel overwrite it.

CVSS severity4.2
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Contiki-NG before 4.9 allows physically proximate attackers to read or write memory via a crafted BLE L2CAP channel ID. In get_channel_for_cid, an 8-bit temporary checks only the low byte of the 16-bit CID, but the full value is recomputed and used to index l2cap_channels. BLE proximity and a crafted L2CAP frame are required; the resulting pointer can expose adjacent memory or let input_l2cap_frame_flow_channel overwrite it.

The record

CVE
CVE-2022-41873
Published
Nov 11, 2022
Updated
Apr 23, 2025
Vendor
Contiki-NG
Product
Contiki-NG
Classifications
CWE-787, CWE-125
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=< 4.9

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Contiki-NG · Contiki-NGversion=< 4.9

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
4.2GitHub, Inc.CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-125Out-of-bounds Read

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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