Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libndp | 1.6-1 | — |
| Debian 13 | libndp | 1.6-1 | — |
| Debian 12 | libndp | 1.6-1 | — |
| Debian 8 | libndp | 1.4-2+deb8u1 | DSA-3581-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | libndp | 1.4-2ubuntu0.16.04.1 | USN-2980-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | libndp +1 | 1.2-6.el7_2 | RHSA-2016:1086 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libndp | 1.6-2.3 | openSUSE-SU-2024:10042-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | libndp +1 | 1.2-6.el7_2 | ELSA-2016-1086 |
Advisories 5
- RHSA-2016:1086 Red Hat Security Advisory: libndp security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2980-1 libndp vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3581-1 libndp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10042-1 libndp-1.6-2.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2016-1086 Moderate: libndp security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 17, 2016
References
- https://github.com/jpirko/libndp/commit/a4892df306e0532487f1634ba6d4c6d4bb381c7f
- https://github.com/jpirko/libndp/commit/2af9a55b38b55abbf05fd116ec097d4029115839
- DSA-3581 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- [oss-security] 20160517 RHSA-2016:1086 libndp: denial of service due to insufficient validation of source of NDP messages mailing-list
- USN-2980-1 vendor-advisory
- RHSA-2016:1086 vendor-advisory