Linux Distros Unpatched Vulnerability : CVE-2026-46863

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

include('compat.inc');

if (description)
{
  script_id(321654);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/22");

  script_cve_id("CVE-2026-46863");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-46863");

  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.

  - Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Connection
    Handling). Supported versions that are affected are MySQL Server: 8.4.0-8.4.9, 9.0.0-9.7.0; MySQL Cluster:
    8.0.11-8.0.46, 8.4.0-8.4.9 and 9.0.0-9.7.0. Easily exploitable vulnerability allows unauthenticated
    attacker with network access via multiple protocols to compromise MySQL Server, MySQL Cluster. Successful
    attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable
    crash (complete DOS) of MySQL Server, MySQL Cluster. (CVE-2026-46863)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-46863");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-46863");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/06/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mariadb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mariadb-10.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mariadb-10.1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mariadb-10.3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mariadb-10.6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mysql-5.5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mysql-5.7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mysql-8.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mysql-8.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:percona-server-5.6");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:percona-xtradb-cluster-5.6");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl", "set_linux_os_id.nasl");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
  script_require_ports("Host/OS/Ubuntu Linux-14.04", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04", "Host/OS/Ubuntu Linux-22.04", "Host/OS/Ubuntu Linux-24.04", "Host/OS/Ubuntu Linux-25.10", "Host/OS/Ubuntu Linux-26.04");

  exit(0);
}

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/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "libmysqlclient-dev"},
          {"reference": "libmysqlclient18"},
          {"reference": "libmysqld-dev"},
          {"reference": "libmysqld-pic"},
          {"reference": "mysql-client"},
          {"reference": "mysql-client-5.5"},
          {"reference": "mysql-client-core-5.5"},
          {"reference": "mysql-common"},
          {"reference": "mysql-server"},
          {"reference": "mysql-server-5.5"},
          {"reference": "mysql-server-core-5.5"},
          {"reference": "mysql-source-5.5"},
          {"reference": "mysql-testsuite"},
          {"reference": "mysql-testsuite-5.5"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "libmysqlclient-dev"},
          {"reference": "libmysqlclient20"},
          {"reference": "libmysqld-dev"},
          {"reference": "mariadb-10.0"},
          {"reference": "mysql-client"},
          {"reference": "mysql-client-5.7"},
          {"reference": "mysql-client-core-5.7"},
          {"reference": "mysql-common"},
          {"reference": "mysql-server"},
          {"reference": "mysql-server-5.7"},
          {"reference": "mysql-server-core-5.7"},
          {"reference": "mysql-source-5.7"},
          {"reference": "mysql-testsuite"},
          {"reference": "mysql-testsuite-5.7"},
          {"reference": "percona-server-5.6"},
          {"reference": "percona-xtradb-cluster-5.6"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "libmysqlclient-dev"},
          {"reference": "libmysqlclient20"},
          {"reference": "libmysqld-dev"},
          {"reference": "mariadb-10.1"},
          {"reference": "mysql-client"},
          {"reference": "mysql-client-5.7"},
          {"reference": "mysql-client-core-5.7"},
          {"reference": "mysql-server"},
          {"reference": "mysql-server-5.7"},
          {"reference": "mysql-server-core-5.7"},
          {"reference": "mysql-source-5.7"},
          {"reference": "mysql-testsuite"},
          {"reference": "mysql-testsuite-5.7"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "libmysqlclient-dev"},
          {"reference": "libmysqlclient21"},
          {"reference": "mariadb-10.3"},
          {"reference": "mysql-client"},
          {"reference": "mysql-client-8.0"},
          {"reference": "mysql-client-core-8.0"},
          {"reference": "mysql-router"},
          {"reference": "mysql-server"},
          {"reference": "mysql-server-8.0"},
          {"reference": "mysql-server-core-8.0"},
          {"reference": "mysql-source-8.0"},
          {"reference": "mysql-testsuite"},
          {"reference": "mysql-testsuite-8.0"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "libmysqlclient-dev"},
          {"reference": "libmysqlclient21"},
          {"reference": "mariadb-10.6"},
          {"reference": "mysql-client"},
          {"reference": "mysql-client-8.0"},
          {"reference": "mysql-client-core-8.0"},
          {"reference": "mysql-router"},
          {"reference": "mysql-server"},
          {"reference": "mysql-server-8.0"},
          {"reference": "mysql-server-core-8.0"},
          {"reference": "mysql-source-8.0"},
          {"reference": "mysql-testsuite"},
          {"reference": "mysql-testsuite-8.0"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "libmysqlclient-dev"},
          {"reference": "libmysqlclient21"},
          {"reference": "mariadb"},
          {"reference": "mysql-client"},
          {"reference": "mysql-client-8.0"},
          {"reference": "mysql-client-core-8.0"},
          {"reference": "mysql-router"},
          {"reference": "mysql-server"},
          {"reference": "mysql-server-8.0"},
          {"reference": "mysql-server-core-8.0"},
          {"reference": "mysql-source-8.0"},
          {"reference": "mysql-testsuite"},
          {"reference": "mysql-testsuite-8.0"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "libmysqlclient-dev"},
          {"reference": "libmysqlclient24"},
          {"reference": "mariadb"},
          {"reference": "mysql-client"},
          {"reference": "mysql-client-core"},
          {"reference": "mysql-router"},
          {"reference": "mysql-server"},
          {"reference": "mysql-server-core"},
          {"reference": "mysql-source"},
          {"reference": "mysql-testsuite"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "libmariadb-dev"},
          {"reference": "libmariadb-dev-compat"},
          {"reference": "libmariadb3"},
          {"reference": "libmariadbd-dev"},
          {"reference": "libmariadbd19t64"},
          {"reference": "libmysqlclient-dev"},
          {"reference": "libmysqlclient24"},
          {"reference": "mariadb-backup"},
          {"reference": "mariadb-client"},
          {"reference": "mariadb-client-compat"},
          {"reference": "mariadb-client-core"},
          {"reference": "mariadb-common"},
          {"reference": "mariadb-plugin-connect"},
          {"reference": "mariadb-plugin-connect-jdbc"},
          {"reference": "mariadb-plugin-cracklib-password-check"},
          {"reference": "mariadb-plugin-gssapi-client"},
          {"reference": "mariadb-plugin-gssapi-server"},
          {"reference": "mariadb-plugin-hashicorp-key-management"},
          {"reference": "mariadb-plugin-mroonga"},
          {"reference": "mariadb-plugin-oqgraph"},
          {"reference": "mariadb-plugin-provider-bzip2"},
          {"reference": "mariadb-plugin-provider-lz4"},
          {"reference": "mariadb-plugin-provider-lzma"},
          {"reference": "mariadb-plugin-provider-lzo"},
          {"reference": "mariadb-plugin-provider-snappy"},
          {"reference": "mariadb-plugin-rocksdb"},
          {"reference": "mariadb-plugin-s3"},
          {"reference": "mariadb-plugin-spider"},
          {"reference": "mariadb-server"},
          {"reference": "mariadb-server-compat"},
          {"reference": "mariadb-server-core"},
          {"reference": "mariadb-test"},
          {"reference": "mariadb-test-data"},
          {"reference": "mysql-client"},
          {"reference": "mysql-client-core"},
          {"reference": "mysql-router"},
          {"reference": "mysql-server"},
          {"reference": "mysql-server-core"},
          {"reference": "mysql-source"},
          {"reference": "mysql-testsuite"}
        ]
      }
    ]
  }
};

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');
}