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Vulnerability record · CVE-2022-35927 · published 4 August 2022

CVE-2022-35927: Contiki-ng classic buffer overflow vulnerability

Contiki Ng · Contiki Ng

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.

9.8 CVSS 3.1 Critical EPSS 2.1% · top 19.5% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score
2.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/contiki-ng/contiki-ng/pull/1589 Third Party Advisory
https://github.com/contiki-ng/contiki-ng/pull/1589/commits/4fffab0e632c4d01910fa957d1fd9ef321eb87d2 PatchThird Party Advisory
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-9rm9-3phh-p4wm Third Party Advisory
https://github.com/contiki-ng/contiki-ng/pull/1589 Third Party Advisory
https://github.com/contiki-ng/contiki-ng/pull/1589/commits/4fffab0e632c4d01910fa957d1fd9ef321eb87d2 PatchThird Party Advisory
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-9rm9-3phh-p4wm Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-35927), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.