CVE-2023-28116Network attack vector

Memory corruption via oversized L2CAP packet copy

Published Mar 17, 2023 · Updated Feb 25, 2025

Out-of-bounds write in Contiki-NG 4.8 and earlier allows remote attackers to corrupt memory via oversized BLE L2CAP packets. The default BLE configuration permits an MTU larger than the actual packetbuf, so L2CAP copies oversized packet data beyond that global buffer. Reachability requires BLE L2CAP packet delivery; published material establishes neither a specific crash nor code execution.

CVSS severity8.1
High
EPSS probability0.69%
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 write in Contiki-NG 4.8 and earlier allows remote attackers to corrupt memory via oversized BLE L2CAP packets. The default BLE configuration permits an MTU larger than the actual packetbuf, so L2CAP copies oversized packet data beyond that global buffer. Reachability requires BLE L2CAP packet delivery; published material establishes neither a specific crash nor code execution.

The record

CVE
CVE-2023-28116
Published
Mar 17, 2023
Updated
Feb 25, 2025
Vendor
Contiki-NG
Product
Contiki-NG
Classifications
CWE-787, CWE-120
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 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?

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

  1. Affected versionversion=<= 4.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Contiki-NG · Contiki-NGversion=<= 4.8

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/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.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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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