Linux Distros Unpatched Vulnerability : CVE-2026-22693

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

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  script_cve_id("CVE-2026-22693");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-22693");

  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.

  - HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null pointer dereference vulnerability
    exists in the SubtableUnicodesCache::create function located in src/hb-ot-cmap-table.hh. The function
    fails to check if hb_malloc returns NULL before using placement new to construct an object at the returned
    pointer address. When hb_malloc fails to allocate memory (which can occur in low-memory conditions or when
    using custom allocators that simulate allocation failures), it returns NULL. The code then attempts to
    call the constructor on this null pointer using placement new syntax, resulting in undefined behavior and
    a Segmentation Fault. This issue has been patched in version 12.3.0. (CVE-2026-22693)

Note that Nessus relies on the presence of the package as reported by the vendor.");
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  script_set_attribute(attribute:"vuln_publication_date", value:"2026/01/10");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mingw64-harfbuzz");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:mingw64-harfbuzz-static");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:thunderbird");
  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/CentOS Linux-7", "Host/OS/CentOS Linux-8", "Host/OS/Debian Linux-11", "Host/OS/Debian Linux-12", "Host/OS/Red Hat Enterprise Linux-10", "Host/OS/Red Hat Enterprise Linux-7", "Host/OS/Red Hat Enterprise Linux-8", "Host/OS/Red Hat Enterprise Linux-9", "Host/OS/Ubuntu Linux-24.04", "Host/OS/Ubuntu Linux-25.04", "Host/OS/Ubuntu Linux-25.10");

  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/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-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "gir1.2-harfbuzz-0.0"},
          {"reference": "libharfbuzz-bin"},
          {"reference": "libharfbuzz-dev"},
          {"reference": "libharfbuzz-doc"},
          {"reference": "libharfbuzz-gobject0"},
          {"reference": "libharfbuzz-icu0"},
          {"reference": "libharfbuzz-subset0"},
          {"reference": "libharfbuzz0-udeb"},
          {"reference": "libharfbuzz0b"}
        ]
      }
    ]
  },
  "Debian Linux-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "gir1.2-harfbuzz-0.0"},
          {"reference": "libharfbuzz-bin"},
          {"reference": "libharfbuzz-dev"},
          {"reference": "libharfbuzz-doc"},
          {"reference": "libharfbuzz-gobject0"},
          {"reference": "libharfbuzz-icu0"},
          {"reference": "libharfbuzz0-udeb"},
          {"reference": "libharfbuzz0b"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "gir1.2-harfbuzz-0.0"},
          {"reference": "libharfbuzz-bin"},
          {"reference": "libharfbuzz-cairo0"},
          {"reference": "libharfbuzz-dev"},
          {"reference": "libharfbuzz-doc"},
          {"reference": "libharfbuzz-gobject0"},
          {"reference": "libharfbuzz-icu0"},
          {"reference": "libharfbuzz-subset0"},
          {"reference": "libharfbuzz0-udeb"},
          {"reference": "libharfbuzz0b"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.04",
        "pkgs": [
          {"reference": "gir1.2-harfbuzz-0.0"},
          {"reference": "libharfbuzz-bin"},
          {"reference": "libharfbuzz-cairo0"},
          {"reference": "libharfbuzz-dev"},
          {"reference": "libharfbuzz-doc"},
          {"reference": "libharfbuzz-gobject0"},
          {"reference": "libharfbuzz-icu0"},
          {"reference": "libharfbuzz-subset0"},
          {"reference": "libharfbuzz0-udeb"},
          {"reference": "libharfbuzz0b"}
        ]
      }
    ]
  },
  "Ubuntu Linux-25.10": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "25.10",
        "pkgs": [
          {"reference": "gir1.2-harfbuzz-0.0"},
          {"reference": "libharfbuzz-bin"},
          {"reference": "libharfbuzz-cairo0"},
          {"reference": "libharfbuzz-dev"},
          {"reference": "libharfbuzz-doc"},
          {"reference": "libharfbuzz-gobject0"},
          {"reference": "libharfbuzz-icu0"},
          {"reference": "libharfbuzz-subset0"},
          {"reference": "libharfbuzz0-udeb"},
          {"reference": "libharfbuzz0b"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "firefox"},
          {"reference": "harfbuzz"},
          {"reference": "harfbuzz-cairo"},
          {"reference": "harfbuzz-devel"},
          {"reference": "harfbuzz-icu"},
          {"reference": "java-21-openjdk"},
          {"reference": "java-21-openjdk-demo"},
          {"reference": "java-21-openjdk-demo-fastdebug"},
          {"reference": "java-21-openjdk-demo-slowdebug"},
          {"reference": "java-21-openjdk-devel"},
          {"reference": "java-21-openjdk-devel-fastdebug"},
          {"reference": "java-21-openjdk-devel-slowdebug"},
          {"reference": "java-21-openjdk-fastdebug"},
          {"reference": "java-21-openjdk-headless"},
          {"reference": "java-21-openjdk-headless-fastdebug"},
          {"reference": "java-21-openjdk-headless-slowdebug"},
          {"reference": "java-21-openjdk-javadoc"},
          {"reference": "java-21-openjdk-javadoc-zip"},
          {"reference": "java-21-openjdk-jmods"},
          {"reference": "java-21-openjdk-jmods-fastdebug"},
          {"reference": "java-21-openjdk-jmods-slowdebug"},
          {"reference": "java-21-openjdk-slowdebug"},
          {"reference": "java-21-openjdk-src"},
          {"reference": "java-21-openjdk-src-fastdebug"},
          {"reference": "java-21-openjdk-src-slowdebug"},
          {"reference": "java-21-openjdk-static-libs"},
          {"reference": "java-21-openjdk-static-libs-fastdebug"},
          {"reference": "java-21-openjdk-static-libs-slowdebug"},
          {"reference": "java-25-openjdk"},
          {"reference": "java-25-openjdk-crypto-adapter"},
          {"reference": "java-25-openjdk-crypto-adapter-fastdebug"},
          {"reference": "java-25-openjdk-crypto-adapter-slowdebug"},
          {"reference": "java-25-openjdk-demo"},
          {"reference": "java-25-openjdk-demo-fastdebug"},
          {"reference": "java-25-openjdk-demo-slowdebug"},
          {"reference": "java-25-openjdk-devel"},
          {"reference": "java-25-openjdk-devel-fastdebug"},
          {"reference": "java-25-openjdk-devel-slowdebug"},
          {"reference": "java-25-openjdk-fastdebug"},
          {"reference": "java-25-openjdk-headless"},
          {"reference": "java-25-openjdk-headless-fastdebug"},
          {"reference": "java-25-openjdk-headless-slowdebug"},
          {"reference": "java-25-openjdk-javadoc"},
          {"reference": "java-25-openjdk-javadoc-zip"},
          {"reference": "java-25-openjdk-jmods"},
          {"reference": "java-25-openjdk-jmods-fastdebug"},
          {"reference": "java-25-openjdk-jmods-slowdebug"},
          {"reference": "java-25-openjdk-slowdebug"},
          {"reference": "java-25-openjdk-src"},
          {"reference": "java-25-openjdk-src-fastdebug"},
          {"reference": "java-25-openjdk-src-slowdebug"},
          {"reference": "java-25-openjdk-static-libs"},
          {"reference": "java-25-openjdk-static-libs-fastdebug"},
          {"reference": "java-25-openjdk-static-libs-slowdebug"},
          {"reference": "thunderbird"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "firefox"},
          {"reference": "harfbuzz"},
          {"reference": "harfbuzz-devel"},
          {"reference": "harfbuzz-icu"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "firefox"},
          {"reference": "harfbuzz"},
          {"reference": "harfbuzz-devel"},
          {"reference": "harfbuzz-icu"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "firefox"},
          {"reference": "harfbuzz"},
          {"reference": "harfbuzz-devel"},
          {"reference": "harfbuzz-icu"},
          {"reference": "java-17-openjdk"},
          {"reference": "java-17-openjdk-demo"},
          {"reference": "java-17-openjdk-demo-fastdebug"},
          {"reference": "java-17-openjdk-demo-slowdebug"},
          {"reference": "java-17-openjdk-devel"},
          {"reference": "java-17-openjdk-devel-fastdebug"},
          {"reference": "java-17-openjdk-devel-slowdebug"},
          {"reference": "java-17-openjdk-fastdebug"},
          {"reference": "java-17-openjdk-headless"},
          {"reference": "java-17-openjdk-headless-fastdebug"},
          {"reference": "java-17-openjdk-headless-slowdebug"},
          {"reference": "java-17-openjdk-javadoc"},
          {"reference": "java-17-openjdk-javadoc-zip"},
          {"reference": "java-17-openjdk-jmods"},
          {"reference": "java-17-openjdk-jmods-fastdebug"},
          {"reference": "java-17-openjdk-jmods-slowdebug"},
          {"reference": "java-17-openjdk-slowdebug"},
          {"reference": "java-17-openjdk-src"},
          {"reference": "java-17-openjdk-src-fastdebug"},
          {"reference": "java-17-openjdk-src-slowdebug"},
          {"reference": "java-17-openjdk-static-libs"},
          {"reference": "java-17-openjdk-static-libs-fastdebug"},
          {"reference": "java-17-openjdk-static-libs-slowdebug"},
          {"reference": "java-21-openjdk"},
          {"reference": "java-21-openjdk-demo"},
          {"reference": "java-21-openjdk-demo-fastdebug"},
          {"reference": "java-21-openjdk-demo-slowdebug"},
          {"reference": "java-21-openjdk-devel"},
          {"reference": "java-21-openjdk-devel-fastdebug"},
          {"reference": "java-21-openjdk-devel-slowdebug"},
          {"reference": "java-21-openjdk-fastdebug"},
          {"reference": "java-21-openjdk-headless"},
          {"reference": "java-21-openjdk-headless-fastdebug"},
          {"reference": "java-21-openjdk-headless-slowdebug"},
          {"reference": "java-21-openjdk-javadoc"},
          {"reference": "java-21-openjdk-javadoc-zip"},
          {"reference": "java-21-openjdk-jmods"},
          {"reference": "java-21-openjdk-jmods-fastdebug"},
          {"reference": "java-21-openjdk-jmods-slowdebug"},
          {"reference": "java-21-openjdk-slowdebug"},
          {"reference": "java-21-openjdk-src"},
          {"reference": "java-21-openjdk-src-fastdebug"},
          {"reference": "java-21-openjdk-src-slowdebug"},
          {"reference": "java-21-openjdk-static-libs"},
          {"reference": "java-21-openjdk-static-libs-fastdebug"},
          {"reference": "java-21-openjdk-static-libs-slowdebug"},
          {"reference": "mingw32-harfbuzz"},
          {"reference": "mingw32-harfbuzz-static"},
          {"reference": "mingw64-harfbuzz"},
          {"reference": "mingw64-harfbuzz-static"},
          {"reference": "thunderbird"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "firefox"},
          {"reference": "harfbuzz"},
          {"reference": "harfbuzz-devel"},
          {"reference": "harfbuzz-icu"},
          {"reference": "java-17-openjdk"},
          {"reference": "java-17-openjdk-demo"},
          {"reference": "java-17-openjdk-demo-fastdebug"},
          {"reference": "java-17-openjdk-demo-slowdebug"},
          {"reference": "java-17-openjdk-devel"},
          {"reference": "java-17-openjdk-devel-fastdebug"},
          {"reference": "java-17-openjdk-devel-slowdebug"},
          {"reference": "java-17-openjdk-fastdebug"},
          {"reference": "java-17-openjdk-headless"},
          {"reference": "java-17-openjdk-headless-fastdebug"},
          {"reference": "java-17-openjdk-headless-slowdebug"},
          {"reference": "java-17-openjdk-javadoc"},
          {"reference": "java-17-openjdk-javadoc-zip"},
          {"reference": "java-17-openjdk-jmods"},
          {"reference": "java-17-openjdk-jmods-fastdebug"},
          {"reference": "java-17-openjdk-jmods-slowdebug"},
          {"reference": "java-17-openjdk-slowdebug"},
          {"reference": "java-17-openjdk-src"},
          {"reference": "java-17-openjdk-src-fastdebug"},
          {"reference": "java-17-openjdk-src-slowdebug"},
          {"reference": "java-17-openjdk-static-libs"},
          {"reference": "java-17-openjdk-static-libs-fastdebug"},
          {"reference": "java-17-openjdk-static-libs-slowdebug"},
          {"reference": "java-21-openjdk"},
          {"reference": "java-21-openjdk-demo"},
          {"reference": "java-21-openjdk-demo-fastdebug"},
          {"reference": "java-21-openjdk-demo-slowdebug"},
          {"reference": "java-21-openjdk-devel"},
          {"reference": "java-21-openjdk-devel-fastdebug"},
          {"reference": "java-21-openjdk-devel-slowdebug"},
          {"reference": "java-21-openjdk-fastdebug"},
          {"reference": "java-21-openjdk-headless"},
          {"reference": "java-21-openjdk-headless-fastdebug"},
          {"reference": "java-21-openjdk-headless-slowdebug"},
          {"reference": "java-21-openjdk-javadoc"},
          {"reference": "java-21-openjdk-javadoc-zip"},
          {"reference": "java-21-openjdk-jmods"},
          {"reference": "java-21-openjdk-jmods-fastdebug"},
          {"reference": "java-21-openjdk-jmods-slowdebug"},
          {"reference": "java-21-openjdk-slowdebug"},
          {"reference": "java-21-openjdk-src"},
          {"reference": "java-21-openjdk-src-fastdebug"},
          {"reference": "java-21-openjdk-src-slowdebug"},
          {"reference": "java-21-openjdk-static-libs"},
          {"reference": "java-21-openjdk-static-libs-fastdebug"},
          {"reference": "java-21-openjdk-static-libs-slowdebug"},
          {"reference": "mingw32-harfbuzz"},
          {"reference": "mingw32-harfbuzz-static"},
          {"reference": "mingw64-harfbuzz"},
          {"reference": "mingw64-harfbuzz-static"},
          {"reference": "thunderbird"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "firefox"},
          {"reference": "firefox-x11"},
          {"reference": "harfbuzz"},
          {"reference": "harfbuzz-devel"},
          {"reference": "harfbuzz-icu"},
          {"reference": "java-17-openjdk"},
          {"reference": "java-17-openjdk-demo"},
          {"reference": "java-17-openjdk-demo-fastdebug"},
          {"reference": "java-17-openjdk-demo-slowdebug"},
          {"reference": "java-17-openjdk-devel"},
          {"reference": "java-17-openjdk-devel-fastdebug"},
          {"reference": "java-17-openjdk-devel-slowdebug"},
          {"reference": "java-17-openjdk-fastdebug"},
          {"reference": "java-17-openjdk-headless"},
          {"reference": "java-17-openjdk-headless-fastdebug"},
          {"reference": "java-17-openjdk-headless-slowdebug"},
          {"reference": "java-17-openjdk-javadoc"},
          {"reference": "java-17-openjdk-javadoc-zip"},
          {"reference": "java-17-openjdk-jmods"},
          {"reference": "java-17-openjdk-jmods-fastdebug"},
          {"reference": "java-17-openjdk-jmods-slowdebug"},
          {"reference": "java-17-openjdk-slowdebug"},
          {"reference": "java-17-openjdk-src"},
          {"reference": "java-17-openjdk-src-fastdebug"},
          {"reference": "java-17-openjdk-src-slowdebug"},
          {"reference": "java-17-openjdk-static-libs"},
          {"reference": "java-17-openjdk-static-libs-fastdebug"},
          {"reference": "java-17-openjdk-static-libs-slowdebug"},
          {"reference": "java-21-openjdk"},
          {"reference": "java-21-openjdk-demo"},
          {"reference": "java-21-openjdk-demo-fastdebug"},
          {"reference": "java-21-openjdk-demo-slowdebug"},
          {"reference": "java-21-openjdk-devel"},
          {"reference": "java-21-openjdk-devel-fastdebug"},
          {"reference": "java-21-openjdk-devel-slowdebug"},
          {"reference": "java-21-openjdk-fastdebug"},
          {"reference": "java-21-openjdk-headless"},
          {"reference": "java-21-openjdk-headless-fastdebug"},
          {"reference": "java-21-openjdk-headless-slowdebug"},
          {"reference": "java-21-openjdk-javadoc"},
          {"reference": "java-21-openjdk-javadoc-zip"},
          {"reference": "java-21-openjdk-jmods"},
          {"reference": "java-21-openjdk-jmods-fastdebug"},
          {"reference": "java-21-openjdk-jmods-slowdebug"},
          {"reference": "java-21-openjdk-slowdebug"},
          {"reference": "java-21-openjdk-src"},
          {"reference": "java-21-openjdk-src-fastdebug"},
          {"reference": "java-21-openjdk-src-slowdebug"},
          {"reference": "java-21-openjdk-static-libs"},
          {"reference": "java-21-openjdk-static-libs-fastdebug"},
          {"reference": "java-21-openjdk-static-libs-slowdebug"},
          {"reference": "java-25-openjdk"},
          {"reference": "java-25-openjdk-crypto-adapter"},
          {"reference": "java-25-openjdk-crypto-adapter-fastdebug"},
          {"reference": "java-25-openjdk-crypto-adapter-slowdebug"},
          {"reference": "java-25-openjdk-demo"},
          {"reference": "java-25-openjdk-demo-fastdebug"},
          {"reference": "java-25-openjdk-demo-slowdebug"},
          {"reference": "java-25-openjdk-devel"},
          {"reference": "java-25-openjdk-devel-fastdebug"},
          {"reference": "java-25-openjdk-devel-slowdebug"},
          {"reference": "java-25-openjdk-fastdebug"},
          {"reference": "java-25-openjdk-headless"},
          {"reference": "java-25-openjdk-headless-fastdebug"},
          {"reference": "java-25-openjdk-headless-slowdebug"},
          {"reference": "java-25-openjdk-javadoc"},
          {"reference": "java-25-openjdk-javadoc-zip"},
          {"reference": "java-25-openjdk-jmods"},
          {"reference": "java-25-openjdk-jmods-fastdebug"},
          {"reference": "java-25-openjdk-jmods-slowdebug"},
          {"reference": "java-25-openjdk-slowdebug"},
          {"reference": "java-25-openjdk-src"},
          {"reference": "java-25-openjdk-src-fastdebug"},
          {"reference": "java-25-openjdk-src-slowdebug"},
          {"reference": "java-25-openjdk-static-libs"},
          {"reference": "java-25-openjdk-static-libs-fastdebug"},
          {"reference": "java-25-openjdk-static-libs-slowdebug"},
          {"reference": "thunderbird"}
        ]
      }
    ]
  }
};

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