Linux Distros Unpatched Vulnerability : CVE-2026-109619

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

include('compat.inc');

if (description)
{
  script_id(370055);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/23");

  script_cve_id("CVE-2026-109619");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-109619");

  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.

  - PHP has various global state that temporarily points into request memory. In some scenarios, global state
    may not be correctly reset, or may be repopulated after being reset. The global state may then refer to
    request memory even after it has been freed. Subsequent requests may read or branch on this stale state
    before it is fully initialized. Multiple strategies can trigger this condition and produce remote code
    execution (RCE). (CVE-2026-109619)

  - A critical vulnerability has been discovered in PHP that will be addressed in a Critical PHP Security
    Release on October 21, 2026. Full details have not yet been shared, but public reporting from several
    trusted sources indicates this is one of the two CVEs that will be included in this release. When this
    flaw is chained with another PHP vulnerability, attackers could gain remote code execution. The chain has
    been dubbed php2shell by researchers at Calif. This description will be updated once PHP publishes full
    details. (CVE-2026-109619)

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-2026-109619");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-109619");
  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:H/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/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:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-109619");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:14.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:php8.4");
  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");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-soap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:php-xml");
  script_set_attribute(attribute:"generated_plugin", value:"current");
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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/Debian Linux-14", "Host/OS/Red Hat Enterprise Linux-9");

  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 = {
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "libapache2-mod-php8.4"},
          {"reference": "libphp8.4-embed"},
          {"reference": "php8.4"},
          {"reference": "php8.4-bcmath"},
          {"reference": "php8.4-bz2"},
          {"reference": "php8.4-cgi"},
          {"reference": "php8.4-cli"},
          {"reference": "php8.4-common"},
          {"reference": "php8.4-curl"},
          {"reference": "php8.4-dba"},
          {"reference": "php8.4-dev"},
          {"reference": "php8.4-enchant"},
          {"reference": "php8.4-fpm"},
          {"reference": "php8.4-gd"},
          {"reference": "php8.4-gmp"},
          {"reference": "php8.4-interbase"},
          {"reference": "php8.4-intl"},
          {"reference": "php8.4-ldap"},
          {"reference": "php8.4-litespeed"},
          {"reference": "php8.4-mbstring"},
          {"reference": "php8.4-mysql"},
          {"reference": "php8.4-odbc"},
          {"reference": "php8.4-opcache"},
          {"reference": "php8.4-pgsql"},
          {"reference": "php8.4-phpdbg"},
          {"reference": "php8.4-readline"},
          {"reference": "php8.4-snmp"},
          {"reference": "php8.4-soap"},
          {"reference": "php8.4-sqlite3"},
          {"reference": "php8.4-sybase"},
          {"reference": "php8.4-tidy"},
          {"reference": "php8.4-xml"},
          {"reference": "php8.4-xsl"},
          {"reference": "php8.4-zip"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "appstream": "php:8.4",
        "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 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_HOLE,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}