==========================================================================
Ubuntu Security Notice USN-8407-1
June 08, 2026

strongswan vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

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

Software Description:
- strongswan: IPsec VPN solution

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.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
  libstrongswan                   6.0.4-1ubuntu3.1
  strongswan                      6.0.4-1ubuntu3.1

Ubuntu 25.10
  libstrongswan                   6.0.1-6ubuntu4.4
  strongswan                      6.0.1-6ubuntu4.4

Ubuntu 24.04 LTS
  libstrongswan                   5.9.13-2ubuntu4.24.04.4
  strongswan                      5.9.13-2ubuntu4.24.04.4

Ubuntu 22.04 LTS
  libstrongswan                   5.9.5-2ubuntu2.7
  strongswan                      5.9.5-2ubuntu2.7

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-8407-1
  CVE-2026-47895

Package Information:
  https://launchpad.net/ubuntu/+source/strongswan/6.0.4-1ubuntu3.1
  https://launchpad.net/ubuntu/+source/strongswan/6.0.1-6ubuntu4.4
  https://launchpad.net/ubuntu/+source/strongswan/5.9.13-2ubuntu4.24.04.4
  https://launchpad.net/ubuntu/+source/strongswan/5.9.5-2ubuntu2.7