Ubuntu USN · USN-8407-1

strongSwan vulnerability

Published: Mon, 08 Jun 2026 17:28

CVE-2026-47895

Summary

strongSwan could be made to crash or run programs if it received specially crafted network traffic.

Details

Elliott Childre discovered that strongSwan incorrectly handled the cloning of certain identities. A remote attacker could use this issue to cause strongSwan to crash, resulting in a denial of service, or possibly execute arbitrary code.

Recommended actions per Ubuntu release

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

Ubuntu jammy

strongswan→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
charon-cmd→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y charon-cmd
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
charon-systemd→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y charon-systemd
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcharon-extauth-plugins→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcharon-extauth-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcharon-extra-plugins→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcharon-extra-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan-extra-plugins→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan-extra-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan-standard-plugins→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan-standard-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-charon→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-charon
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-libcharon→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-libcharon
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-nm→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-nm
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-pki→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-pki
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-scepclient→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-scepclient
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-starter→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-starter
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-swanctl→5.9.5-2ubuntu2.7apt_upgrade
Standard apt upgrade. Install 5.9.5-2ubuntu2.7 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-swanctl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

strongswan→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
charon-cmd→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y charon-cmd
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
charon-systemd→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y charon-systemd
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcharon-extauth-plugins→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcharon-extauth-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcharon-extra-plugins→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcharon-extra-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan-extra-plugins→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan-extra-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan-standard-plugins→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan-standard-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-charon→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-charon
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-libcharon→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-libcharon
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-nm→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-nm
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-pki→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-pki
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-starter→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-starter
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-swanctl→5.9.13-2ubuntu4.24.04.4apt_upgrade
Standard apt upgrade. Install 5.9.13-2ubuntu4.24.04.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-swanctl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu questing

strongswan→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
charon-cmd→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y charon-cmd
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
charon-systemd→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y charon-systemd
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcharon-extauth-plugins→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcharon-extauth-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcharon-extra-plugins→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcharon-extra-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan-extra-plugins→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan-extra-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan-standard-plugins→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan-standard-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-charon→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-charon
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-libcharon→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-libcharon
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-nm→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-nm
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-pki→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-pki
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-starter→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-starter
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-swanctl→6.0.1-6ubuntu4.4apt_upgrade
Standard apt upgrade. Install 6.0.1-6ubuntu4.4 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-swanctl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

strongswan→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
charon-cmd→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y charon-cmd
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
charon-systemd→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y charon-systemd
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcharon-extauth-plugins→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcharon-extauth-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libcharon-extra-plugins→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libcharon-extra-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan-extra-plugins→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan-extra-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
libstrongswan-standard-plugins→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y libstrongswan-standard-plugins
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-charon→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-charon
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-libcharon→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-libcharon
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-nm→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-nm
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-pki→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-pki
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-starter→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-starter
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
strongswan-swanctl→6.0.4-1ubuntu3.1apt_upgrade
Standard apt upgrade. Install 6.0.4-1ubuntu3.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y strongswan-swanctl
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

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