CVE-2023-50927Network attack vector

Service interruption via unchecked RPL sub-option lengths

Published Feb 14, 2024 · Updated Apr 24, 2025

Out-of-bounds reads in Contiki-NG before 4.9 allow remote attackers to interrupt service via malformed RPL-Lite DIO or DAO messages. The dio_input() and dao_input() parsers trust packet and sub-option lengths before confirming that complete headers and option payloads remain in the ICMP buffer. Unauthenticated network reachability to an RPL node is sufficient; the documented impact is availability loss, with no reported code execution or data modification.

CVSS severity7.5
High
EPSS probability0.51%
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 reads in Contiki-NG before 4.9 allow remote attackers to interrupt service via malformed RPL-Lite DIO or DAO messages. The dio_input() and dao_input() parsers trust packet and sub-option lengths before confirming that complete headers and option payloads remain in the ICMP buffer. Unauthenticated network reachability to an RPL node is sufficient; the documented impact is availability loss, with no reported code execution or data modification.

The record

CVE
CVE-2023-50927
Published
Feb 14, 2024
Updated
Apr 24, 2025
Vendor
Contiki-NG
Product
Contiki-NG
Classifications
CWE-125, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 14, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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=0 <4.9
  2. Affected versionversion=< 4.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Contiki-NG · Contiki-NGversion=0 <4.9; version=< 4.9

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
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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