CVE-2022-35927

Name: CVE-2022-35927
Creator: NVD / NIST
Published: 2022-08-04T21:15:08.103+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.64%

Last modified Jun 17, 2026

CVE-2022-35927 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Contiki-NG is an open-source, cross-platform operating system for IoT devices. In the RPL-Classic routing protocol implementation in the Contiki-NG operating system, an incoming DODAG Information Option (DIO) control message can contain a prefix information option with a length parameter. EPSS estimates a 1.64% chance of exploitation in the next 30 days.

Description

Contiki-NG is an open-source, cross-platform operating system for IoT devices. In the RPL-Classic routing protocol implementation in the Contiki-NG operating system, an incoming DODAG Information Option (DIO) control message can contain a prefix information option with a length parameter. The value of the length parameter is not validated, however, and it is possible to cause a buffer overflow when copying the prefix in the set_ip_from_prefix function. This vulnerability affects anyone running a Contiki-NG version prior to 4.7 that can receive RPL DIO messages from external parties. To obtain a patched version, users should upgrade to Contiki-NG 4.7 or later. There are no workarounds for this issue.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.64%

73.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Contiki-Ng	Contiki-Ng	< 4.7

References

https://github.com/contiki-ng/contiki-ng/pull/1589Third Party Advisory
https://github.com/contiki-ng/contiki-ng/pull/1589/commits/4fffab0e632c4d01910fa957d1fd9ef321eb87d2Patch, Third Party Advisory
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-9rm9-3phh-p4wmThird Party Advisory
https://github.com/contiki-ng/contiki-ng/pull/1589Third Party Advisory
https://github.com/contiki-ng/contiki-ng/pull/1589/commits/4fffab0e632c4d01910fa957d1fd9ef321eb87d2Patch, Third Party Advisory
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-9rm9-3phh-p4wmThird Party Advisory

Timeline

Published: Aug 4, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-35927?

How severe is CVE-2022-35927?

CVE-2022-35927 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.64% probability of exploitation in the next 30 days.

How do I fix CVE-2022-35927?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-35927?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST