Ubuntu USN · USN-8403-1

Kea DHCP vulnerability

Published: Mon, 08 Jun 2026 14:28

CVE-2026-3608

Summary

Kea DHCP could be made to crash if it received specially crafted messages.

Details

Ali Norouzi discovered that Kea DHCP did not properly handle maliciously crafted messages over configured API sockets and HA listeners. A remote attacker could possibly use this issue to cause Kea DHCP to crash, resulting in a denial of service.

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu noble

isc-kea→2.4.1-3ubuntu0.2apt_upgrade
Standard apt upgrade. Install 2.4.1-3ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y isc-kea
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea→2.4.1-3ubuntu0.2apt_upgrade
Standard apt upgrade. Install 2.4.1-3ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-admin→2.4.1-3ubuntu0.2apt_upgrade
Standard apt upgrade. Install 2.4.1-3ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-admin
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-common→2.4.1-3ubuntu0.2apt_upgrade
Standard apt upgrade. Install 2.4.1-3ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-common
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-ctrl-agent→2.4.1-3ubuntu0.2apt_upgrade
Standard apt upgrade. Install 2.4.1-3ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-ctrl-agent
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-dev→2.4.1-3ubuntu0.2apt_upgrade
Standard apt upgrade. Install 2.4.1-3ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-dhcp-ddns-server→2.4.1-3ubuntu0.2apt_upgrade
Standard apt upgrade. Install 2.4.1-3ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-dhcp-ddns-server
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-dhcp4-server→2.4.1-3ubuntu0.2apt_upgrade
Standard apt upgrade. Install 2.4.1-3ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-dhcp4-server
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-dhcp6-server→2.4.1-3ubuntu0.2apt_upgrade
Standard apt upgrade. Install 2.4.1-3ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-dhcp6-server
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-doc→2.4.1-3ubuntu0.2apt_upgrade
Standard apt upgrade. Install 2.4.1-3ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-kea-connector→2.4.1-3ubuntu0.2apt_upgrade
Standard apt upgrade. Install 2.4.1-3ubuntu0.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-kea-connector
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu questing

isc-kea→2.6.3-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 2.6.3-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y isc-kea
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea→2.6.3-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 2.6.3-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-admin→2.6.3-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 2.6.3-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-admin
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-common→2.6.3-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 2.6.3-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-common
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-ctrl-agent→2.6.3-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 2.6.3-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-ctrl-agent
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-dev→2.6.3-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 2.6.3-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-dev
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-dhcp-ddns-server→2.6.3-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 2.6.3-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-dhcp-ddns-server
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-dhcp4-server→2.6.3-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 2.6.3-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-dhcp4-server
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-dhcp6-server→2.6.3-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 2.6.3-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-dhcp6-server
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
kea-doc→2.6.3-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 2.6.3-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y kea-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
python3-kea-connector→2.6.3-2ubuntu0.1apt_upgrade
Standard apt upgrade. Install 2.6.3-2ubuntu0.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y python3-kea-connector
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

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