Description
In strongSwan before 6.0.7, identity parsing/cloning is mishandled. Parsed EAP-Identities that result in an empty but non-NULL encoding are not correctly cloned and trigger a double-free once the duplicates are destroyed.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| strongSwan | strongSwan | 4.3.3 – < 6.0.7 | 6.0.7 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | strongswan | 6.0.7-1 | — |
| Debian 13 | strongswan | 6.0.1-6+deb13u6 | — |
| Debian 12 | strongswan | 5.9.8-5+deb12u5 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | strongswan | 6.0.4-1ubuntu3.1 | — |
| Ubuntu 25.10 | strongswan | 6.0.1-6ubuntu4.4 | — |
| Ubuntu 24.04 LTS | strongswan | 5.9.13-2ubuntu4.24.04.4 | — |
| Ubuntu 22.04 LTS | strongswan | 5.9.5-2ubuntu2.7 | — |
| Ubuntu 20.04 LTS | strongswan | No fix yet | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 20.04 LTS | strongswan | No fix yet | — |
| Ubuntu Pro FIPS 18.04 LTS | strongswan | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | strongswan | No fix yet | — |
| Ubuntu Pro FIPS-updates 22.04 LTS | strongswan | 5.9.5-2ubuntu2.7+Fips1 | — |
| Ubuntu Pro FIPS-updates 20.04 LTS | strongswan | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | strongswan | No fix yet | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | strongswan | No fix yet | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | strongswan | No fix yet | — |
| Ubuntu Pro 18.04 LTS | strongswan | No fix yet | — |
| Ubuntu Pro 16.04 LTS | strongswan | No fix yet | — |
| Ubuntu Pro 14.04 LTS | strongswan | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | strongswan | 5.9.14-150700.3.21.2 | SUSE-SU-2026:4115-1 |
| SLES 15 SP5 | strongswan | 5.9.11-150500.5.23.2 | SUSE-SU-2026:2459-1 |
| SLES 15 SP4 | strongswan | 5.9.11-150400.19.35.1 | SUSE-SU-2026:2368-1 |
| SLES 12 SP5 | strongswan | 5.1.3-26.38.1 | SUSE-SU-2026:2312-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | strongswan | 6.0.6-160000.2.1 | SUSE-SU-2026:22168-1 |
| SLES for SAP 15 SP5 | strongswan | 5.9.11-150500.5.23.2 | SUSE-SU-2026:2459-1 |
| SLES for SAP 15 SP4 | strongswan | 5.9.11-150400.19.35.1 | SUSE-SU-2026:2368-1 |
| SLES 16.0 | strongswan | 6.0.6-160000.2.1 | SUSE-SU-2026:22168-1 |
| SLE HPC 15 SP5 | strongswan | 5.9.11-150500.5.23.2 | SUSE-SU-2026:2459-1 |
| SLE HPC 15 SP4 | strongswan | 5.9.11-150400.19.35.1 | SUSE-SU-2026:2368-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | strongswan | 6.0.7-1.1 | openSUSE-SU-2026:11005-1 |
| openSUSE Leap 16.0 | strongswan | 6.0.6-160000.2.1 | openSUSE-SU-2026:21092-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | strongswan | 6.0.7-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | strongswan | 5.9.14-10 | — |
Advisories 8
- SUSE-SU-2026:4115-1 Security update for strongswan SUSE / openSUSE Security Updates · Sep 14, 2026
- WID-SEC-2026-1832 strongSwan: Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Sep 13, 2026
- openSUSE-SU-2026:21092-1 Security update for strongswan SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:22168-1 Security update for strongswan SUSE / openSUSE Security Updates · Jun 24, 2026
- SUSE-SU-2026:2459-1 Security update for strongswan SUSE / openSUSE Security Updates · Jun 20, 2026
- openSUSE-SU-2026:11005-1 strongswan-6.0.7-1.1 on GA media SUSE / openSUSE Security Updates · Jun 12, 2026
- SUSE-SU-2026:2368-1 Security update for strongswan SUSE / openSUSE Security Updates · Jun 12, 2026
- SUSE-SU-2026:2312-1 Security update for strongswan SUSE / openSUSE Security Updates · Jun 10, 2026