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CVE-2019-8359

29
FAUCET Score

CVE-2019-8359 is a critical out-of-bounds write vulnerability affecting Contiki-NG through version 4.3 and Contiki through version 3.0. This flaw occurs during 6LoWPAN fragment reassembly in os/net/ipv6/sicslowpan.c when processing forged fragment offsets. With a CVSS score of 9.8 (CRITICAL), this vulnerability allows an unauthenticated attacker to achieve high impact on confidentiality, integrity, and availability over the network with low attack complexity. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.3CPE matchmatch criteria
cpe:2.3:o:contiki-ng:contiki-ng:*:*:*:*:*:*:*:*
<= 3.0CPE matchmatch criteria
cpe:2.3:o:contiki-os:contiki:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.12%
Probability of exploitation in next 30 days
EPSS Percentile
80.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0212 is in the 69th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / contiki-ng/contiki-ng/pull/972
PatchThird Party Advisory
github.com / contiki-ng/contiki-ng/releases/tag/release%2Fv4.4
Release NotesThird Party Advisory
usenix.org / system/files/sec20summer_clements_prepub.pdf
Technical DescriptionThird Party Advisory