CVE-2021-21282

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

Contiki-NG is an open-source, cross-platform operating system for internet of things devices. In versions prior to 4.5, buffer overflow can be triggered by an input packet when using either of Contiki-NG's two RPL implementations in source-routing mode. The problem has been patched in Contiki-NG 4.5. Users can apply the patch for this vulnerability out-of-band as a workaround.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-120

Affected software

Vendor	Product	Versions
contiki-ng	contiki-ng	< 4.5

References

https://github.com/contiki-ng/contiki-ng/pull/1183Patch, Third Party Advisory
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-6xf2-77gf-fgjxPatch, Third Party Advisory
https://github.com/contiki-ng/contiki-ng/pull/1183Patch, Third Party Advisory
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-6xf2-77gf-fgjxPatch, Third Party Advisory

Timeline

Published: Jun 18, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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