CVE-2023-50926: Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices

Q: How do I fix CVE-2023-50926?

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

Q: Is CVE-2023-50926 being exploited?

CVE-2023-50926 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-2023-50926 affect?

CVE-2023-50926 affects contiki-ng. Severity is high (CVSS 7.5). Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. An out-of-bounds read can be caused by an incoming DIO message when using the RPL-Lite implementation in the Contiki-NG operating system. More sp

Q: How urgent is CVE-2023-50926?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2023-50926 is a high-severity flaw (CVSS 7.5) 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 Next-Generation IoT devices. An out-of-bounds read can be caused by an incoming DIO message when using the RPL-Lite implementation in the Contiki-NG operating system. More specifically, the prefix information of the DIO message contains a field that specifies the length of an IPv6 address prefix. The value of this field is not validated, which means that an attacker can set a value

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-125
Published	2024-02-14
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

2024-02-14 20:15 UTCPublished CVE record published
2026-06-17 06:40 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-2023-50926?

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

Is CVE-2023-50926 being exploited?

CVE-2023-50926 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-2023-50926 affect?

CVE-2023-50926 affects contiki-ng. Severity is high (CVSS 7.5). Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. An out-of-bounds read can be caused by an incoming DIO message when using the RPL-Lite implementation in the Contiki-NG operating system. More sp

How urgent is CVE-2023-50926?

Priority 42/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-47181 HIGH 7.5 UPGRADE Contiki-NG is an open-source, cross-platform operating system for IoT devices
CVE-2024-41126 HIGH 8.3 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-2023-50927 HIGH 8.6 UPGRADE Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices
CVE-2023-48229 HIGH 7.0 UPGRADE Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices

References

← Back to latest CVEs