CVE-2026-78135
Fixed in a distro release EPSS <1%CVSS 5.6
libcharon in strongSwan 5.9.7 through 6.0.7 mishandles behavioral workflow in the IKEv2 state machine. Because CREATE_CHILD_SA requests are mishandled, there can be an authentication bypass.
Products: strongswan
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | strongswan | no fix |
| Debian 13 | strongswan | 6.0.1-6+deb13u7 |
| Debian 14 | strongswan | 6.1.0-1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | strongswan | 5.9.11-150400.19.40.2 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | strongswan | 5.9.11-150400.19.40.2 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | strongswan | 5.9.14-150700.3.21.2 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | strongswan | 5.9.14-150700.3.21.2 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | strongswan | 5.9.11-150400.19.40.2 |
| SUSE Linux Enterprise Server 16.0 | strongswan | 6.0.6-160000.3.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | strongswan | 5.9.11-150400.19.40.2 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | strongswan | 6.0.6-160000.3.1 |
| SUSE Linux Enterprise Workstation Extension 15 SP7 | strongswan | 5.9.14-150700.3.21.2 |
| Ubuntu 20.04 LTS | strongswan | no fix |
| Ubuntu 22.04 LTS | strongswan | 5.9.5-2ubuntu2.8 |
| Ubuntu 24.04 LTS | strongswan | 5.9.13-2ubuntu4.24.04.5 |
| Ubuntu 26.04 LTS | strongswan | 6.0.4-1ubuntu3.2 |
| Ubuntu Pro 14.04 LTS | strongswan | no fix |
| Ubuntu Pro 16.04 LTS | strongswan | no fix |
| Ubuntu Pro 18.04 LTS | strongswan | no fix |
| Ubuntu Pro FIPS-preview 22.04 LTS | strongswan | no fix |
| Ubuntu Pro FIPS-updates 16.04 LTS | strongswan | no fix |
| Ubuntu Pro FIPS-updates 18.04 LTS | strongswan | no fix |
| Ubuntu Pro FIPS-updates 20.04 LTS | strongswan | no fix |
| Ubuntu Pro FIPS-updates 22.04 LTS | strongswan | no fix |
| Ubuntu Pro FIPS 16.04 LTS | strongswan | no fix |
| Ubuntu Pro FIPS 18.04 LTS | strongswan | no fix |
| Ubuntu Pro FIPS 20.04 LTS | strongswan | no fix |
| openSUSE Leap 16.0 | strongswan | 6.0.6-160000.3.1 |
| openSUSE Tumbleweed | strongswan | 6.1.0-1.1 |