CVE-2015-2923

The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in FreeBSD through 10.1...

6.5 Medium

The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in FreeBSD through 10.1 allows remote attackers to reconfigure a hop-limit setting via a small hop_limit value in a Router Advertisement (RA) message.

Attack profile

How easy it is to exploit

Attack vector: Adjacent network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.38%Up 0.2 points since Feb 4, 2022

What each source reports

NVD Score used 6.5

Record: CVE-2015-2923
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 3.3 LowAV:A/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-20
Updated: 2026-11-02

CVE List No score

Record: CVE-2015-2923
Updated: 2026-11-02

EUVDEUVD-2015-3008 No score

Record: EUVD-2015-3008
Updated: 2026-11-03

GitHub AdvisoriesGHSA-vgpp-7j95-7pmj No score

The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in FreeBSD through 10.1...

Record: GHSA-vgpp-7j95-7pmj
Updated: 2026-11-02

Affected products

freebsd

Affected packages

Affected packages
Package	Affected	Fixed
`kfreebsd-9` Debian:7 From an advisory covering 2 CVEs	before 9.0-10+deb70.10, plus listed versions 9.0-109.0-10+deb70.19.0-10+deb70.29.0-10+deb70.39.0-10+deb70.4 Show 5 moreShow less 9.0-10+deb70.59.0-10+deb70.69.0-10+deb70.79.0-10+deb70.89.0-10+deb70.9	9.0-10+deb70.10

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2015-2923 is a medium vulnerability (CVSS 6.5) in Freebsd, published May 18, 2015. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.38%, the 72nd percentile. No source names a fixed version.