CVE-2024-41126: Contiki-NG is an open-source, cross-platform operating system for IoT devices

Q: How do I fix CVE-2024-41126?

contiki-ng: upgrade to newer than 4.9. Exact commands for each OS are on this page.

Q: Is CVE-2024-41126 being exploited?

CVE-2024-41126 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-41126 affect?

CVE-2024-41126 affects contiki-ng. Severity is high (CVSS 8.3). Contiki-NG is an open-source, cross-platform operating system for IoT devices. An out-of-bounds read of 1 byte can be triggered when sending a packet to a device running the Contiki-NG operating system with SNMP enabled. The SNMP module is

Routine

HIGH 8.3UPGRADE

CVE-2024-41126 is a high-severity flaw (CVSS 8.3) affecting contiki-ng. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Contiki-NG is an open-source, cross-platform operating system for IoT devices. An out-of-bounds read of 1 byte can be triggered when sending a packet to a device running the Contiki-NG operating system with SNMP enabled. The SNMP module is disabled in the default Contiki-NG configuration. The vulnerability exists in the os/net/app-layer/snmp/snmp-message.c module, where the snmp_message_decode function fails to check the boundary of the message b

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.3 (High)
Attack vector	Adjacent network
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-125
Published	2024-11-27
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: contiki-ng

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-11-27 19:15 UTCPublished CVE record published
2026-06-17 07:47 UTCUpdated Record last modified

contiki-ng contiki-ng UPGRADE

Affected: <= 4.9

Fixed in: newer than 4.9

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-41126?

contiki-ng: upgrade to newer than 4.9. Exact commands for each OS are on this page.

Is CVE-2024-41126 being exploited?

CVE-2024-41126 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-41126 affect?

CVE-2024-41126 affects contiki-ng. Severity is high (CVSS 8.3). Contiki-NG is an open-source, cross-platform operating system for IoT devices. An out-of-bounds read of 1 byte can be triggered when sending a packet to a device running the Contiki-NG operating system with SNMP enabled. The SNMP module is

How urgent is CVE-2024-41126?

Priority 35/100. High severity

Related CVEs

CVE-2024-47181 HIGH 7.5 UPGRADE Contiki-NG is an open-source, cross-platform operating system for IoT devices
CVE-2024-41125 HIGH 8.3 UPGRADE Contiki-NG is an open-source, cross-platform operating system for IoT devices
CVE-2023-29001 HIGH 7.5 UPGRADE Contiki-NG is an open-source, cross-platform operating system for IoT devices

References

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