USN-8196-2

Haruto Kimura discovered that strongSwan incorrectly handled the supported_versions extension in TLS. A remote attacker could possibly use this issue to cause strongSwan to stop responding, resulting in a denial of service. (CVE-2026-35328)

Haruto Kimura discovered that strongSwan incorrectly handled certain encrypted PKCS#7 containers. A remote attacker could possibly use this issue to cause strongSwan to crash, resulting in a denial of service. (CVE-2026-35329)

Lukas Johannes Moeller discovered that strongSwan incorrectly handled certain EAP-SIM/AKA attributes. A remote attacker could use this issue to cause strongSwan to stop responding, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-35330)

Haruto Kimura discovered that strongSwan incorrectly handled processing of X.509 name constraints. A remote attacker could possibly use this issue to bypass excluded name constraints. (CVE-2026-35331)

Haruto Kimura discovered that strongSwan incorrectly processed ECDH public values. A remote attacker could possibly use this issue to cause strongSwan to crash, resulting in a denial of service. (CVE-2026-35332)

Lukas Johannes Moeller discovered that strongSwan incorrectly handled certain RADIUS attributes. A remote attacker could possibly use this issue to cause strongSwan to crash, resulting in a denial of service. (CVE-2026-35333)

Ryo Shimada discovered that strongSwan incorrectly handled RSA decryption. A remote attacker could possibly use this issue to cause strongSwan to crash, resulting in a denial of service. (CVE-2026-35334)

References

Affected packages

Ubuntu:26.04 / strongswan

Package

Name: strongswan
Purl: pkg:deb/ubuntu/strongswan@6.0.4-1ubuntu3?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

6.0.4-1ubuntu3

Affected versions

6.*

6.0.1-6ubuntu4

6.0.1-6ubuntu5

6.0.4-1ubuntu1

6.0.4-1ubuntu2

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "charon-cmd",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "charon-systemd",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "libcharon-extauth-plugins",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "libcharon-extra-plugins",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "libstrongswan",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "libstrongswan-extra-plugins",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "libstrongswan-standard-plugins",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "strongswan",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "strongswan-charon",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "strongswan-libcharon",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "strongswan-nm",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "strongswan-pki",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "strongswan-starter",
            "binary_version": "6.0.4-1ubuntu3"
        },
        {
            "binary_name": "strongswan-swanctl",
            "binary_version": "6.0.4-1ubuntu3"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8196-2.json"

cves_map

{
    "ecosystem": "Ubuntu:26.04",
    "cves": [
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35328"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35329"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35330"
        },
        {
            "id": "CVE-2026-35331",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-35332",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35333"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35334"
        }
    ]
}