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Fencer Intel
high 8.1

CVE-2016-3698 json

libndp before 1.6, as used in NetworkManager, does not properly validate the origin of Neighbor Discovery Protocol (NDP) messages, which al…

published 2016-06-13 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-4719

cvss
8.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.8%
EPSS 3.8% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

libndp before 1.6, as used in NetworkManager, does not properly validate the origin of Neighbor Discovery Protocol (NDP) messages, which allows remote attackers to conduct man-in-the-middle attacks or cause a denial of service (network connectivity disruption) by advertising a node as a router from a non-local network.

Patch / fix

  • libndp Debian 14, Debian 13, Debian 12 1.6-1

debian advisories DEBIAN-CVE-2016-3698

  • libndp Ubuntu 16.04 LTS 1.4-2ubuntu0.16.04.1

ubuntu advisories UBUNTU-CVE-2016-3698

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libndp RHEL 7 1.2-6.el7_2

red hat advisories RHSA-2016:1086

  • libndp openSUSE Tumbleweed 1.6-2.3

opensuse advisories openSUSE-SU-2024:10042-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-3698 updated cvss 5.4

libndp: denial of service due to insufficient validation of source of NDP messages

  • Red Hat Enterprise Linux Client (v. 7) libndp 1.2-6.el7_2 Red Hat Enterprise Linux Client Optional (v. 7) libndp 1.2-6.el7_2 Red Hat Enterprise Linux ComputeNode (v. 7) libndp 1.2-6.el7_2 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libndp 1.2-6.el7_2 Red Hat Enterprise Linux Server (v. 7) libndp 1.2-6.el7_2 Red Hat Enterprise Linux Server Optional (v. 7) libndp 1.2-6.el7_2
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) libndp 1.2-6.el7_2 Red Hat Enterprise Linux Workstation Optional (v. 7) libndp 1.2-6.el7_2
    fixed: vendor fix RHSA-2016:1086

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.81% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.