CVE-2021-21410 : faille critique contiki-ng contiki-ng (CVSS 9.1)

Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. An out-of-bounds read can be triggered by 6LoWPAN packets sent to devices running Contiki-NG 4.6 and prior. The IPv6 header decompression function (<code>uncompress_hdr_iphc</code>) does not perform proper boundary checks when reading from the packet buffer. Hence, it is possible to construct a compressed 6LoWPAN packet that will read more bytes than what is available from the packet buffer. As of time of publication, there is not a release with a patch available. Users can apply the patch for this vulnerability out-of-band as a workaround.

Sévérité

Critique (CVSS 9.1)

Vecteur CVSS

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

Exploitation active

Non signalée par la CISA

Publication

18 juin 2021

Dernière mise à jour

17 juin 2026

• contiki-ng contiki-ng

• Fiche CVE-2021-21410 sur le NVD (NIST)
• github.com/contiki-ng/contiki-ng/pull/1482
• github.com/contiki…