CVE-2024-41126

One-byte out-of-bounds read via unchecked OID boundary

Published Nov 27, 2024 · Updated Nov 27, 2024

Out-of-bounds read in Contiki-NG 4.9 and earlier allows remote attackers to trigger a one-byte read past an SNMP message buffer. After snmp_message_decode decodes an OID, it dereferences the input pointer without verifying that snmp_packet->used remains nonzero. Exposure requires SNMP to be enabled, which is not the default, and adjacent packet reachability; the documented effect is a one-byte over-read.

CVSS severity8.3
High
EPSS probability0.29%
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 read in Contiki-NG 4.9 and earlier allows remote attackers to trigger a one-byte read past an SNMP message buffer. After snmp_message_decode decodes an OID, it dereferences the input pointer without verifying that snmp_packet->used remains nonzero. Exposure requires SNMP to be enabled, which is not the default, and adjacent packet reachability; the documented effect is a one-byte over-read.

The record

CVE
CVE-2024-41126
Published
Nov 27, 2024
Updated
Nov 27, 2024
Vendor
Contiki-NG
Product
Contiki-NG
Classifications
CWE-125
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 2024Record 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

8.3GitHub, Inc.CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
9.6NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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