Linux Distros Unpatched Vulnerability : CVE-2026-101806

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

include('compat.inc');

if (description)
{
  script_id(371333);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/23");

  script_cve_id("CVE-2026-101806");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-101806");

  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 Connectors product of Oracle MySQL (component: Connector/ODBC). The supported
    version that is affected is 26.7.1. Difficult to exploit vulnerability allows low privileged attacker with
    network access via multiple protocols to compromise MySQL Connectors. Successful attacks of this
    vulnerability can result in unauthorized creation, deletion or modification access to critical data or all
    MySQL Connectors accessible data as well as unauthorized access to critical data or complete access to all
    MySQL Connectors accessible data. (CVE-2026-101806)

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-2026-101806");
  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:H/PR:L/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-101806");

  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:"2026/10/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/23");

  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: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:mysql-9.7");
  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-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-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 third_party_support = get_kb_item('Host/OS/extended-third-party');
if (!empty_or_null(third_party_support)) {
    var third_party_vendors = distro_constraints_values['third_party'];
    if (!empty_or_null(third_party_vendors)) {
        var vendor;
        foreach vendor (third_party_vendors) {
            if (vendor == third_party_support) exit(0, 'A third party management patch is available for this vulnerability from ' + vendor + '.\n');
        }
    }
}

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_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}