Linux Distros Unpatched Vulnerability : CVE-2026-7568

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

include('compat.inc');

if (description)
{
  script_id(313256);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/03");

  script_cve_id("CVE-2026-7568");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-7568");

  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 PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the
    metaphone() function in ext/standard/metaphone.c uses a signed int variable to track the current position
    within the input string. If a string longer than 2,147,483,647 bytes is passed, a signed integer overflow
    occurs, resulting in undefined behavior. This can lead to an out-of-bounds read, causing a segmentation
    fault or access to unrelated memory, and may affect the availability of the PHP process. (CVE-2026-7568)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2026-7568");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-7568");
  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:N/I:N/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:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L");
  script_set_attribute(attribute:"cvss4_supplemental", value:"CVSS:4.0/RE:L/U:Amber");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-7568");

  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:"plugin_publication_date", value:"2026/05/08");

  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:redhat:enterprise_linux:10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:php7.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-bcmath");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-cli");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-dba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-embedded");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-enchant");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-ffi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-fpm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-gd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-gmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-intl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-mbstring");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-mysqlnd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-odbc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-opcache");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-pdo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-process");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-snmp");
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  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/Red Hat Enterprise Linux-10", "Host/OS/Ubuntu Linux-14.04", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04");

  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")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) 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": "libapache2-mod-php5"},
          {"reference": "libapache2-mod-php5filter"},
          {"reference": "libphp5-embed"},
          {"reference": "php-pear"},
          {"reference": "php5"},
          {"reference": "php5-cgi"},
          {"reference": "php5-cli"},
          {"reference": "php5-common"},
          {"reference": "php5-curl"},
          {"reference": "php5-dbg"},
          {"reference": "php5-dev"},
          {"reference": "php5-enchant"},
          {"reference": "php5-fpm"},
          {"reference": "php5-gd"},
          {"reference": "php5-gmp"},
          {"reference": "php5-intl"},
          {"reference": "php5-ldap"},
          {"reference": "php5-mysql"},
          {"reference": "php5-mysqlnd"},
          {"reference": "php5-odbc"},
          {"reference": "php5-pgsql"},
          {"reference": "php5-pspell"},
          {"reference": "php5-readline"},
          {"reference": "php5-recode"},
          {"reference": "php5-snmp"},
          {"reference": "php5-sqlite"},
          {"reference": "php5-sybase"},
          {"reference": "php5-tidy"},
          {"reference": "php5-xmlrpc"},
          {"reference": "php5-xsl"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "libapache2-mod-php7.0"},
          {"reference": "libphp7.0-embed"},
          {"reference": "php7.0"},
          {"reference": "php7.0-bcmath"},
          {"reference": "php7.0-bz2"},
          {"reference": "php7.0-cgi"},
          {"reference": "php7.0-cli"},
          {"reference": "php7.0-common"},
          {"reference": "php7.0-curl"},
          {"reference": "php7.0-dev"},
          {"reference": "php7.0-enchant"},
          {"reference": "php7.0-fpm"},
          {"reference": "php7.0-gd"},
          {"reference": "php7.0-gmp"},
          {"reference": "php7.0-imap"},
          {"reference": "php7.0-interbase"},
          {"reference": "php7.0-intl"},
          {"reference": "php7.0-json"},
          {"reference": "php7.0-ldap"},
          {"reference": "php7.0-mbstring"},
          {"reference": "php7.0-mcrypt"},
          {"reference": "php7.0-mysql"},
          {"reference": "php7.0-odbc"},
          {"reference": "php7.0-opcache"},
          {"reference": "php7.0-pgsql"},
          {"reference": "php7.0-phpdbg"},
          {"reference": "php7.0-pspell"},
          {"reference": "php7.0-readline"},
          {"reference": "php7.0-recode"},
          {"reference": "php7.0-snmp"},
          {"reference": "php7.0-soap"},
          {"reference": "php7.0-sqlite3"},
          {"reference": "php7.0-sybase"},
          {"reference": "php7.0-tidy"},
          {"reference": "php7.0-xml"},
          {"reference": "php7.0-xmlrpc"},
          {"reference": "php7.0-xsl"},
          {"reference": "php7.0-zip"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "libapache2-mod-php7.2"},
          {"reference": "libphp7.2-embed"},
          {"reference": "php7.2"},
          {"reference": "php7.2-bcmath"},
          {"reference": "php7.2-bz2"},
          {"reference": "php7.2-cgi"},
          {"reference": "php7.2-cli"},
          {"reference": "php7.2-common"},
          {"reference": "php7.2-curl"},
          {"reference": "php7.2-dba"},
          {"reference": "php7.2-dev"},
          {"reference": "php7.2-enchant"},
          {"reference": "php7.2-fpm"},
          {"reference": "php7.2-gd"},
          {"reference": "php7.2-gmp"},
          {"reference": "php7.2-imap"},
          {"reference": "php7.2-interbase"},
          {"reference": "php7.2-intl"},
          {"reference": "php7.2-json"},
          {"reference": "php7.2-ldap"},
          {"reference": "php7.2-mbstring"},
          {"reference": "php7.2-mysql"},
          {"reference": "php7.2-odbc"},
          {"reference": "php7.2-opcache"},
          {"reference": "php7.2-pgsql"},
          {"reference": "php7.2-phpdbg"},
          {"reference": "php7.2-pspell"},
          {"reference": "php7.2-readline"},
          {"reference": "php7.2-recode"},
          {"reference": "php7.2-snmp"},
          {"reference": "php7.2-soap"},
          {"reference": "php7.2-sqlite3"},
          {"reference": "php7.2-sybase"},
          {"reference": "php7.2-tidy"},
          {"reference": "php7.2-xml"},
          {"reference": "php7.2-xmlrpc"},
          {"reference": "php7.2-xsl"},
          {"reference": "php7.2-zip"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "libapache2-mod-php7.4"},
          {"reference": "libphp7.4-embed"},
          {"reference": "php7.4"},
          {"reference": "php7.4-bcmath"},
          {"reference": "php7.4-bz2"},
          {"reference": "php7.4-cgi"},
          {"reference": "php7.4-cli"},
          {"reference": "php7.4-common"},
          {"reference": "php7.4-curl"},
          {"reference": "php7.4-dba"},
          {"reference": "php7.4-dev"},
          {"reference": "php7.4-enchant"},
          {"reference": "php7.4-fpm"},
          {"reference": "php7.4-gd"},
          {"reference": "php7.4-gmp"},
          {"reference": "php7.4-imap"},
          {"reference": "php7.4-interbase"},
          {"reference": "php7.4-intl"},
          {"reference": "php7.4-json"},
          {"reference": "php7.4-ldap"},
          {"reference": "php7.4-mbstring"},
          {"reference": "php7.4-mysql"},
          {"reference": "php7.4-odbc"},
          {"reference": "php7.4-opcache"},
          {"reference": "php7.4-pgsql"},
          {"reference": "php7.4-phpdbg"},
          {"reference": "php7.4-pspell"},
          {"reference": "php7.4-readline"},
          {"reference": "php7.4-snmp"},
          {"reference": "php7.4-soap"},
          {"reference": "php7.4-sqlite3"},
          {"reference": "php7.4-sybase"},
          {"reference": "php7.4-tidy"},
          {"reference": "php7.4-xml"},
          {"reference": "php7.4-xmlrpc"},
          {"reference": "php7.4-xsl"},
          {"reference": "php7.4-zip"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "php"},
          {"reference": "php-bcmath"},
          {"reference": "php-cli"},
          {"reference": "php-common"},
          {"reference": "php-dba"},
          {"reference": "php-dbg"},
          {"reference": "php-devel"},
          {"reference": "php-embedded"},
          {"reference": "php-enchant"},
          {"reference": "php-ffi"},
          {"reference": "php-fpm"},
          {"reference": "php-gd"},
          {"reference": "php-gmp"},
          {"reference": "php-intl"},
          {"reference": "php-ldap"},
          {"reference": "php-mbstring"},
          {"reference": "php-mysqlnd"},
          {"reference": "php-odbc"},
          {"reference": "php-opcache"},
          {"reference": "php-pdo"},
          {"reference": "php-pgsql"},
          {"reference": "php-process"},
          {"reference": "php-snmp"},
          {"reference": "php-soap"},
          {"reference": "php-xml"}
        ]
      }
    ]
  }
};

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');
}