Linux Distros Unpatched Vulnerability : CVE-2026-89162

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

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  script_id(344744);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/11");

  script_cve_id("CVE-2026-89162");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-89162");

  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.

  - In PCRE2 before 10.48, pcre2_serialize_encode might disclose two bytes to an adversary, typically in a
    situation where the access available to the adversary is already unsafe. (CVE-2026-89162)

Note that Nessus relies on the presence of the package as reported by the vendor.");
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  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-89162");
  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:N/A:N");
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  script_set_attribute(attribute:"exploit_available", value:"false");
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  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/11");
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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');

var distro_constraints_array = {
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "libpcre2-16-0"},
          {"reference": "libpcre2-32-0"},
          {"reference": "libpcre2-8-0"},
          {"reference": "libpcre2-8-0-udeb"},
          {"reference": "libpcre2-dev"},
          {"reference": "libpcre2-posix3"},
          {"reference": "pcre2-utils"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "mariadb"},
          {"reference": "mariadb-backup"},
          {"reference": "mariadb-client-utils"},
          {"reference": "mariadb-common"},
          {"reference": "mariadb-devel"},
          {"reference": "mariadb-embedded"},
          {"reference": "mariadb-embedded-devel"},
          {"reference": "mariadb-errmsg"},
          {"reference": "mariadb-gssapi-server"},
          {"reference": "mariadb-oqgraph-engine"},
          {"reference": "mariadb-pam"},
          {"reference": "mariadb-server"},
          {"reference": "mariadb-server-galera"},
          {"reference": "mariadb-server-utils"},
          {"reference": "mariadb-test"},
          {"reference": "mariadb10.11"},
          {"reference": "mariadb11.8"},
          {"reference": "mariadb11.8-backup"},
          {"reference": "mariadb11.8-client-utils"},
          {"reference": "mariadb11.8-common"},
          {"reference": "mariadb11.8-devel"},
          {"reference": "mariadb11.8-embedded"},
          {"reference": "mariadb11.8-embedded-devel"},
          {"reference": "mariadb11.8-errmsg"},
          {"reference": "mariadb11.8-gssapi-server"},
          {"reference": "mariadb11.8-oqgraph-engine"},
          {"reference": "mariadb11.8-pam"},
          {"reference": "mariadb11.8-server"},
          {"reference": "mariadb11.8-server-galera"},
          {"reference": "mariadb11.8-server-utils"},
          {"reference": "mariadb11.8-test"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "Judy"},
          {"reference": "galera"},
          {"reference": "mariadb"},
          {"reference": "mariadb-backup"},
          {"reference": "mariadb-common"},
          {"reference": "mariadb-devel"},
          {"reference": "mariadb-embedded"},
          {"reference": "mariadb-embedded-devel"},
          {"reference": "mariadb-errmsg"},
          {"reference": "mariadb-gssapi-server"},
          {"reference": "mariadb-oqgraph-engine"},
          {"reference": "mariadb-pam"},
          {"reference": "mariadb-server"},
          {"reference": "mariadb-server-galera"},
          {"reference": "mariadb-server-utils"},
          {"reference": "mariadb-test"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "Judy"},
          {"reference": "galera"},
          {"reference": "mariadb"},
          {"reference": "mariadb-backup"},
          {"reference": "mariadb-common"},
          {"reference": "mariadb-devel"},
          {"reference": "mariadb-embedded"},
          {"reference": "mariadb-embedded-devel"},
          {"reference": "mariadb-errmsg"},
          {"reference": "mariadb-gssapi-server"},
          {"reference": "mariadb-oqgraph-engine"},
          {"reference": "mariadb-pam"},
          {"reference": "mariadb-server"},
          {"reference": "mariadb-server-galera"},
          {"reference": "mariadb-server-utils"},
          {"reference": "mariadb-test"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "mariadb"},
          {"reference": "mariadb-backup"},
          {"reference": "mariadb-common"},
          {"reference": "mariadb-devel"},
          {"reference": "mariadb-embedded"},
          {"reference": "mariadb-embedded-devel"},
          {"reference": "mariadb-errmsg"},
          {"reference": "mariadb-gssapi-server"},
          {"reference": "mariadb-oqgraph-engine"},
          {"reference": "mariadb-pam"},
          {"reference": "mariadb-server"},
          {"reference": "mariadb-server-galera"},
          {"reference": "mariadb-server-utils"},
          {"reference": "mariadb-test"}
        ]
      }
    ]
  }
};

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');
}