A packet containing a malformed DUID can cause the kea-dhcp6 server to terminate
Published Oct 16, 2019
6.5
MEDIUMCVSS 3.1
EPSS 0.72%
Description
A missing check on incoming client requests can be exploited to cause a situation where the Kea server's lease storage contains leases which are rejected as invalid when the server tries to load leases from storage on restart. If the number of such leases exceeds a hard-coded limit in the Kea code, a server trying to restart will conclude that there is a problem with its lease store and give up. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2
Affected products
-
- Version 1.4.0 to 1.5.0StatusaffectedConstraints-
- Version 1.6.0-beta1StatusaffectedConstraints-
- Version 1.6.0-beta2StatusaffectedConstraints-
- Version
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
Upgrade to a version of Kea containing a fix, available via https://www.isc.org/downloads.
- Kea 1.4.0-P2 - Kea 1.5.0-P1 - Kea 1.6.0
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (CVE.org) ▾
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:A/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.72% (0.00717) | 52.11th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.13% (0.01128) | 62.00th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.59% (0.01595) | 80.40th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.15% (0.00152) | 51.95th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.15% (0.00152) | 51.63th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.15% (0.00152) | 49.62th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Jan 6, 2022 | 1.84% (0.01840) | 47.32th | v1 |
| Jan 5, 2022 | 0.42% (0.00416) | 26.65th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
References (1)
- https://kb.isc.org/docs/cve-2019-6474 x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://kb.isc.org/docs/cve-2019-6474 | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.