The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Debian Linux - strongswan - None  Ubuntu Linux - Accepting Certificates Violating Name Constraints     (CVE-2026-35331)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1762-1 advisory.

    - CVE-2026-35329: NULL pointer dereference when processing padding in PKCS#7 (bsc#1261717).
    - CVE-2026-35330: integer underflow when handling EAP-SIM/AKA attributes (bsc#1261705).
    - CVE-2026-35331: acceptance of certificates violating X.509 name constraints (bsc#1261718).
    - CVE-2026-35332: NULL pointer dereference when handling ECDH public value in TLS (bsc#1261708).
    - CVE-2026-35333: integer underflow when handling RADIUS attributes (bsc#1261706).
    - CVE-2026-35334: possible NULL pointer dereference in RSA decryption (bsc#1261720).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 12 / 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6227 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6227-1                   security@debian.org     https://www.debian.org/security/                        Yves-Alexis Perez     April 22, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : strongswan     CVE ID         : CVE-2026-35328 CVE-2026-35329 CVE-2026-35330 CVE-2026-35331                      CVE-2026-35332 CVE-2026-35333 CVE-2026-35334

    Multiple vulnerabilities were fixed in strongSwan, an IKE/IPsec suite.

    CVE-2026-35328

        A vulnerability in libtls related to the processing of the         supported_versions extension in TLS that can result in an infinite         loop.

    CVE-2026-35329

        Vulnerabilities in libstrongswan and the pkcs7 plugin related to the         processing of encrypted PKCS#7 containers that can result in a crash.

    CVE-2026-35330

        A vulnerability in libsimaka related to the processing of certain         EAP-SIM/AKA attributes that can result in an infinite loop or a         heap-based buffer overflow and potentially remote code execution.

    CVE-2026-35331

        A vulnerability in the constraints plugin related to the processing of         X.509 name constraints that can allow authentication with certificates         that violate the constraints.

    CVE-2026-35332

        A vulnerability in libtls related to the processing of ECDH public         values in TLS < 1.3 that can result in a crash.

    CVE-2026-35333

        A vulnerability in libradius related to the processing of RADIUS         attributes that can result in an infinite loop or an out-of-bounds         read that may cause a crash.

    CVE-2026-35334

        A vulnerability in the gmp plugin related to RSA decryption that can         result in a crash.

    For the oldstable distribution (bookworm), these problems have been fixed     in version 5.9.8-5+deb12u4.

    For the stable distribution (trixie), these problems have been fixed in     version 6.0.1-6+deb13u5.

    We recommend that you upgrade your strongswan packages.

    For the detailed security status of strongswan please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/strongswan

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8196-1 advisory.

    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)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1637-1 advisory.

    - CVE-2026-35328: infinite loop when handling supported versions TLS extension (bsc#1261712).
    - CVE-2026-35329: null pointer dereference when processing padding in PKCS#7 (bsc#1261717).
    - CVE-2026-35330: integer underflow when handling EAP-SIM/AKA attributes (bsc#1261705).
    - CVE-2026-35331: accepting certificates violating name constraints (bsc#1261718).
    - CVE-2026-35332: null pointer dereference when handling ECDH public value in TLS (bsc#1261708).
    - CVE-2026-35333: integer underflow when handling RADIUS attributes (bsc#1261706).
    - CVE-2026-35334: possible null pointer dereference in RSA decryption (bsc#1261720).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20678-1 advisory.

    Update to version 6.0.6 (jsc#PED-16145).

    Security issued fixed:

    - CVE-2026-35328: infinite loop when handling supported versions TLS extension (bsc#1261712).
    - CVE-2026-35329: NULL pointer dereference when processing padding in PKCS#7 (bsc#1261717).
    - CVE-2026-35330: integer underflow when handling EAP-SIM/AKA attributes (bsc#1261705).
    - CVE-2026-35331: acceptance of certificates violating X.509 name constraints (bsc#1261718).
    - CVE-2026-35332: NULL pointer dereference when handling ECDH public value in TLS (bsc#1261708).
    - CVE-2026-35333: integer underflow when handling RADIUS attributes (bsc#1261706).
    - CVE-2026-35334: possible NULL pointer dereference in RSA decryption (bsc#1261720).

    Other updates and bugfixes:

    - Version 6.0.6.
      * Enhancements and Optimizations
        * Added the unique ID to the log messages when creating an IKE SA as responder and when deleting such     a half-open           SA
        * The credential factory now enforces an upper limit of 10 when creating nested credentials.
        * Added Georgian translation to the NM plugin.
      * Fixes
        * IKEv2 fragments with a total fragment count lower than before are now dropped as mandated by the RFC     .
        * Fixed a potential out-of-bounds read when parsing EAP-SIM/AKA attributes with actual length field.
        * Fixed a potential out-of-bounds read when enumerating hashes in OCSP CERTREQ payloads .
        * Fixed a potential crash in the vici plugin when parsing messages that encode the length of a     VICI_LIST_ITEM           incorrectly.
        * Avoid allocating a large buffer for TLS cipher suites on the stack using alloca().
        * Ensure TLS 1.3 CertificateRequest structures are valid on the client.
        * Prevent an infinite loop if the EAP-SIM version list on the client contains more than one entry .
        * Fixed a crash in the tnccs_11 plugin if TNCCS-ReasonStrings is empty or only contains empty nodes .
        * Fixed verification of RSA signatures with SHA3-224 via botan plugin.
        * Close the internal IPv6 socket when a tun_device_t is destroyed .
        * Update the address family in the SA selector when the addresses of a tunnel mode IPsec SA change in     the           kernel-netlink plugin.
    - Version 6.0.5:
      * Fixed a vulnerability in the eap-ttls plugin related to processing EAP-TTLS AVPs that can lead to     resource         exhaustion or a crash.
      * The new `icmp` option enables the forwarding of certain ICMP error messages (e.g. Fragmentation     Needed), even if         their source address doesn't match the negotiated traffic selectors, when running on Linux kernels     that support this         (v6.9+).
      * charon-cmd now supports childless IKE SA initiation with the `--childless` option.
      * The dhcp plugin now keeps track of address leases across make-before-break reauthentications to avoid     releasing the         address when the old SA is terminated
      * Added support for `organizationIdentifier` RDNs, which are used in e.g. eIDAS certificates, when     parsing ASN.1 DN         identities from strings.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-cc6fcd3a58 advisory.

    Fixes CVE-2026-25075, CVE-2026-35328, CVE-2026-35329, CVE-2026-35330, CVE-2026-35331, CVE-2026-35332,     CVE-2026-35333, CVE-2026-35334

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
309708	Linux Distros Unpatched Vulnerability : CVE-2026-35331	Nessus	Misc.	4/22/2026	4/29/2026	high
313690	SUSE SLES12 Security Update : strongswan (SUSE-SU-2026:1762-1)	Nessus	SuSE Local Security Checks	5/10/2026	5/15/2026	high
309664	Debian dsa-6227 : charon-cmd - security update	Nessus	Debian Local Security Checks	4/22/2026	5/15/2026	high
309912	Ubuntu 22.04 LTS / 24.04 LTS / 25.10 : strongSwan vulnerabilities (USN-8196-1)	Nessus	Ubuntu Local Security Checks	4/23/2026	5/15/2026	high
311744	SUSE SLED15 / SLES15 Security Update : strongswan (SUSE-SU-2026:1637-1)	Nessus	SuSE Local Security Checks	5/2/2026	5/15/2026	high
313701	openSUSE 16 Security Update : strongswan (openSUSE-SU-2026:20678-1)	Nessus	SuSE Local Security Checks	5/10/2026	5/15/2026	high
315970	Fedora 44 : strongswan (2026-cc6fcd3a58)	Nessus	Fedora Local Security Checks	5/20/2026	5/20/2026	high

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