# CVE-2019-6473: kea-dhcp6-server: An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the...

CVE-2019-6473 is fixed in 5 products on 1 platform, first by kea-admin 1.1.0-1ubuntu0.1~esm1, released August 27, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-6473
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0117
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 27, 2019

## Description

An invalid hostname option can trigger an assertion failure in the Kea DHCPv4 server process (kea-dhcp4), causing the server process to exit. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | kea-admin Ubuntu 18.04.6 LTS (bionic) | 1.1.0-1ubuntu0.1~esm1 | [kea-admin 1.1.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-kea-admin-1.1.0-1ubuntu0.1-esm1.md) | Aug 27, 2019 |
| Linux | kea-common Ubuntu 18.04.6 LTS (bionic) | 1.1.0-1ubuntu0.1~esm1 | [kea-common 1.1.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-kea-common-1.1.0-1ubuntu0.1-esm1.md) | Aug 27, 2019 |
| Linux | kea-dhcp-ddns-server Ubuntu 18.04.6 LTS (bionic) | 1.1.0-1ubuntu0.1~esm1 | [kea-dhcp-ddns-server 1.1.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-kea-dhcp-ddns-server-1.1.0-1ubuntu0.1-esm1.md) | Aug 27, 2019 |
| Linux | kea-dhcp4-server Ubuntu 18.04.6 LTS (bionic) | 1.1.0-1ubuntu0.1~esm1 | [kea-dhcp4-server 1.1.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-kea-dhcp4-server-1.1.0-1ubuntu0.1-esm1.md) | Aug 27, 2019 |
| Linux | kea-dhcp6-server Ubuntu 18.04.6 LTS (bionic) | 1.1.0-1ubuntu0.1~esm1 | [kea-dhcp6-server 1.1.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-kea-dhcp6-server-1.1.0-1ubuntu0.1-esm1.md) | Aug 27, 2019 |

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Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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