Linux Distros Unpatched Vulnerability : CVE-2026-4105

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

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  script_cve_id("CVE-2026-4105");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-4105");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - A flaw was found in systemd. The systemd-machined service contains an Improper Access Control
    vulnerability due to insufficient validation of the class parameter in the RegisterMachine D-Bus (Desktop
    Bus) method. A local unprivileged user can exploit this by attempting to register a machine with a
    specific class value, which may leave behind a usable, attacker-controlled machine object. This allows the
    attacker to invoke methods on the privileged object, leading to the execution of arbitrary commands with
    root privileges on the host system. (CVE-2026-4105)

Note that Nessus relies on the presence of the package as reported by the vendor.");
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  script_set_attribute(attribute:"solution", value:
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  script_set_attribute(attribute:"agent", value:"unix");
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  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
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  script_set_attribute(attribute:"vuln_publication_date", value:"2026/03/13");
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if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/CentOS/rpm-list")) && empty_or_null(get_one_kb_item("Host/Debian/dpkg-l")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

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          {"reference": "NetworkManager-config-connectivity-redhat"},
          {"reference": "NetworkManager-config-server"},
          {"reference": "NetworkManager-dispatcher-routing-rules"},
          {"reference": "NetworkManager-initscripts-updown"},
          {"reference": "NetworkManager-libnm"},
          {"reference": "NetworkManager-libnm-devel"},
          {"reference": "NetworkManager-ovs"},
          {"reference": "NetworkManager-ppp"},
          {"reference": "NetworkManager-team"},
          {"reference": "NetworkManager-tui"},
          {"reference": "NetworkManager-wifi"},
          {"reference": "NetworkManager-wwan"},
          {"reference": "systemd"},
          {"reference": "systemd-container"},
          {"reference": "systemd-devel"},
          {"reference": "systemd-journal-remote"},
          {"reference": "systemd-libs"},
          {"reference": "systemd-pam"},
          {"reference": "systemd-tests"},
          {"reference": "systemd-udev"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "NetworkManager"},
          {"reference": "NetworkManager-adsl"},
          {"reference": "NetworkManager-bluetooth"},
          {"reference": "NetworkManager-cloud-setup"},
          {"reference": "NetworkManager-config-connectivity-redhat"},
          {"reference": "NetworkManager-config-server"},
          {"reference": "NetworkManager-dispatcher-routing-rules"},
          {"reference": "NetworkManager-initscripts-updown"},
          {"reference": "NetworkManager-libnm"},
          {"reference": "NetworkManager-libnm-devel"},
          {"reference": "NetworkManager-ovs"},
          {"reference": "NetworkManager-ppp"},
          {"reference": "NetworkManager-team"},
          {"reference": "NetworkManager-tui"},
          {"reference": "NetworkManager-wifi"},
          {"reference": "NetworkManager-wwan"},
          {"reference": "systemd"},
          {"reference": "systemd-container"},
          {"reference": "systemd-devel"},
          {"reference": "systemd-journal-remote"},
          {"reference": "systemd-libs"},
          {"reference": "systemd-pam"},
          {"reference": "systemd-tests"},
          {"reference": "systemd-udev"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "NetworkManager"},
          {"reference": "NetworkManager-adsl"},
          {"reference": "NetworkManager-bluetooth"},
          {"reference": "NetworkManager-cloud-setup"},
          {"reference": "NetworkManager-config-connectivity-redhat"},
          {"reference": "NetworkManager-config-server"},
          {"reference": "NetworkManager-dispatcher-routing-rules"},
          {"reference": "NetworkManager-initscripts-updown"},
          {"reference": "NetworkManager-libnm"},
          {"reference": "NetworkManager-libnm-devel"},
          {"reference": "NetworkManager-ovs"},
          {"reference": "NetworkManager-ppp"},
          {"reference": "NetworkManager-team"},
          {"reference": "NetworkManager-tui"},
          {"reference": "NetworkManager-wifi"},
          {"reference": "NetworkManager-wwan"},
          {"reference": "rhel-net-naming-sysattrs"},
          {"reference": "systemd"},
          {"reference": "systemd-boot-unsigned"},
          {"reference": "systemd-container"},
          {"reference": "systemd-devel"},
          {"reference": "systemd-journal-remote"},
          {"reference": "systemd-libs"},
          {"reference": "systemd-oomd"},
          {"reference": "systemd-pam"},
          {"reference": "systemd-resolved"},
          {"reference": "systemd-rpm-macros"},
          {"reference": "systemd-udev"},
          {"reference": "systemd-ukify"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}