An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0. An out of bounds write is present in the data section during 6LoWPAN fragment re-assembly in the face of forged fragment offsets in os/net/ipv6/sicslowpan.c.
https://www.usenix.org/system/files/sec20summer_clements_prepub.pdf
https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.4
https://github.com/contiki-ng/contiki-ng/pull/972
Source: Mitre, NVD
Published: 2020-04-23
Updated: 2026-06-17
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.00656