CVE-2019-8359

Name: CVE-2019-8359
Creator: NVD / NIST
Published: 2020-04-23T15:15:13.903+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.12%

Last modified Jun 17, 2026

CVE-2019-8359 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 2.12% chance of exploitation in the next 30 days.

Description

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.

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

2.12%

79.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Contiki-Ng	Contiki-Ng	<= 4.3
Contiki-Os	Contiki	<= 3.0

References

https://github.com/contiki-ng/contiki-ng/pull/972Patch, Third Party Advisory
https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.4Release Notes, Third Party Advisory
https://www.usenix.org/system/files/sec20summer_clements_prepub.pdfTechnical Description, Third Party Advisory
https://github.com/contiki-ng/contiki-ng/pull/972Patch, Third Party Advisory
https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.4Release Notes, Third Party Advisory
https://www.usenix.org/system/files/sec20summer_clements_prepub.pdfTechnical Description, Third Party Advisory

Timeline

Published: Apr 23, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-8359?

How severe is CVE-2019-8359?

CVE-2019-8359 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.12% probability of exploitation in the next 30 days.

How do I fix CVE-2019-8359?

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-2019-8359?

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

Scan your code now

Source: NVD / NIST