USN-8196-1

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Source
https://ubuntu.com/security/notices/USN-8196-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8196-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8196-1
Upstream
Related
Published
2026-04-22T12:46:23Z
Modified
2026-04-27T19:02:35.850034548Z
Summary
strongswan vulnerabilities
Details

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:22.04:LTS / strongswan

Package

Name
strongswan
Purl
pkg:deb/ubuntu/strongswan@5.9.5-2ubuntu2.6?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.9.5-2ubuntu2.6

Affected versions

5.*
5.9.1-1ubuntu3
5.9.1-1ubuntu3.1
5.9.4-1ubuntu1
5.9.4-1ubuntu2
5.9.4-1ubuntu3
5.9.4-1ubuntu4
5.9.5-2ubuntu1
5.9.5-2ubuntu2
5.9.5-2ubuntu2.1
5.9.5-2ubuntu2.2
5.9.5-2ubuntu2.3
5.9.5-2ubuntu2.4
5.9.5-2ubuntu2.5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "charon-cmd",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "charon-systemd",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "libcharon-extauth-plugins",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "libcharon-extra-plugins",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "libstrongswan",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "libstrongswan-extra-plugins",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "libstrongswan-standard-plugins",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "strongswan",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "strongswan-charon",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "strongswan-libcharon",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "strongswan-nm",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "strongswan-pki",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "strongswan-scepclient",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "strongswan-starter",
            "binary_version": "5.9.5-2ubuntu2.6"
        },
        {
            "binary_name": "strongswan-swanctl",
            "binary_version": "5.9.5-2ubuntu2.6"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8196-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "id": "CVE-2026-35328",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-35329",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35330"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35331"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35332"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35333"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35334"
        }
    ]
}

Ubuntu:24.04:LTS / strongswan

Package

Name
strongswan
Purl
pkg:deb/ubuntu/strongswan@5.9.13-2ubuntu4.24.04.3?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.9.13-2ubuntu4.24.04.3

Affected versions

5.*
5.9.11-1ubuntu1
5.9.11-1ubuntu2
5.9.12-1ubuntu1
5.9.13-2ubuntu1
5.9.13-2ubuntu3
5.9.13-2ubuntu4
5.9.13-2ubuntu4.24.04.1
5.9.13-2ubuntu4.24.04.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "charon-cmd",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "charon-systemd",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "libcharon-extauth-plugins",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "libcharon-extra-plugins",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "libstrongswan",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "libstrongswan-extra-plugins",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "libstrongswan-standard-plugins",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "strongswan",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "strongswan-charon",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "strongswan-libcharon",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "strongswan-nm",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "strongswan-pki",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "strongswan-starter",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        },
        {
            "binary_name": "strongswan-swanctl",
            "binary_version": "5.9.13-2ubuntu4.24.04.3"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8196-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:24.04:LTS",
    "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"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35331"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35332"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35333"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35334"
        }
    ]
}

Ubuntu:25.10 / strongswan

Package

Name
strongswan
Purl
pkg:deb/ubuntu/strongswan@6.0.1-6ubuntu4.3?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.0.1-6ubuntu4.3

Affected versions

5.*
5.9.13-2ubuntu4
5.9.13-2ubuntu5
6.*
6.0.1-6ubuntu2
6.0.1-6ubuntu4
6.0.1-6ubuntu4.1
6.0.1-6ubuntu4.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "charon-cmd",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "charon-systemd",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "libcharon-extauth-plugins",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "libcharon-extra-plugins",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "libstrongswan",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "libstrongswan-extra-plugins",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "libstrongswan-standard-plugins",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "strongswan",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "strongswan-charon",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "strongswan-libcharon",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "strongswan-nm",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "strongswan-pki",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "strongswan-starter",
            "binary_version": "6.0.1-6ubuntu4.3"
        },
        {
            "binary_name": "strongswan-swanctl",
            "binary_version": "6.0.1-6ubuntu4.3"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8196-1.json"
cves_map 
{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35328"
        },
        {
            "id": "CVE-2026-35329",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35330"
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35331"
        },
        {
            "id": "CVE-2026-35332",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "id": "CVE-2026-35333",
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ]
        },
        {
            "severity": [
                {
                    "type": "Ubuntu",
                    "score": "medium"
                }
            ],
            "id": "CVE-2026-35334"
        }
    ]
}