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
Published Feb 20, 2020
6.5
MEDIUMCVSS 3.1
EPSS 1.38%
Description
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
6.5 MEDIUM NVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Adjacent
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
No CVSS v3.0 score for this CVE.
3.3 LOW NVD
AV:A/AC:L/Au:N/C:N/I:N/A:P
Access Vector Adjacent
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.38% 0.01378
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01378
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.38% (0.01378) | 71.08th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.38% (0.01378) | 68.42th | v5 (v2026.06.15) |
| Jul 28, 2025 | 1.38% (0.01382) | 79.47th | v4 (v2025.03.14) |
| May 31, 2025 | 5.45% (0.05451) | 89.66th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.17% (0.03168) | 86.08th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.23% (0.00233) | 62.27th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.23% (0.00233) | 61.59th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.23% (0.00233) | 59.59th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
Weaknesses (1)
References (4)
- http://openwall.com/lists/oss-security/2015/04/04/2 x_refsource_MISCMailing ListThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6fd99094de2b83d1d4c8457f2c83483b2828e75a x_refsource_MISCPatchThird Party Advisory
- https://lists.freebsd.org/pipermail/freebsd-net/2015-April/041934.html x_refsource_MISCMailing ListVendor Advisory
- https://www.freebsd.org/security/advisories/FreeBSD-SA-15:09.ipv6.asc x_refsource_MISCMitigationVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://openwall.com/lists/oss-security/2015/04/04/2 | x_refsource_MISCMailing ListThird Party Advisory | |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6fd99094de2b83d1d4c8457f2c83483b2828e75a | x_refsource_MISCPatchThird Party Advisory | |
| https://lists.freebsd.org/pipermail/freebsd-net/2015-April/041934.html | x_refsource_MISCMailing ListVendor Advisory | |
| https://www.freebsd.org/security/advisories/FreeBSD-SA-15:09.ipv6.asc | x_refsource_MISCMitigationVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Feb 20, 2020
Updated Aug 6, 2024
Reserved Apr 4, 2015
Link CVE-2015-2923
CISA Vulnrichment
Updated n/a