Linux Distros Unpatched Vulnerability : CVE-2026-83408

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

include('compat.inc');

if (description)
{
  script_id(346967);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/18");

  script_cve_id("CVE-2026-83408");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-83408");

  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 Oracle GraalVM for JDK, Oracle GraalVM product of Oracle Java SE (component:
    Compiler). The supported version that is affected is Oracle GraalVM for JDK 17: 23.0.13.1; Oracle GraalVM
    for JDK 21: 23.1.12.1; Oracle GraalVM: 25.0.4.1. Difficult to exploit vulnerability allows unauthenticated
    attacker with network access via HTTP to compromise Oracle GraalVM for JDK, Oracle GraalVM. Successful
    attacks of this vulnerability can result in takeover of Oracle GraalVM for JDK, Oracle GraalVM.
    (CVE-2026-83408)

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-2026-83408");
  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:U/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:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-83408");

  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:"2026/09/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:openjdk-13");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-16");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-17");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-17-crac");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-18");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-21");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-21-crac");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-25");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-lts");
  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-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-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "openjdk-8-dbg"},
          {"reference": "openjdk-8-demo"},
          {"reference": "openjdk-8-doc"},
          {"reference": "openjdk-8-jdk"},
          {"reference": "openjdk-8-jdk-headless"},
          {"reference": "openjdk-8-jre"},
          {"reference": "openjdk-8-jre-headless"},
          {"reference": "openjdk-8-jre-jamvm"},
          {"reference": "openjdk-8-jre-zero"},
          {"reference": "openjdk-8-source"},
          {"reference": "openjdk-9"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "openjdk-11-dbg"},
          {"reference": "openjdk-11-demo"},
          {"reference": "openjdk-11-doc"},
          {"reference": "openjdk-11-jdk"},
          {"reference": "openjdk-11-jdk-headless"},
          {"reference": "openjdk-11-jre"},
          {"reference": "openjdk-11-jre-headless"},
          {"reference": "openjdk-11-jre-zero"},
          {"reference": "openjdk-11-source"},
          {"reference": "openjdk-17"},
          {"reference": "openjdk-8"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "openjdk-11-dbg"},
          {"reference": "openjdk-11-demo"},
          {"reference": "openjdk-11-doc"},
          {"reference": "openjdk-11-jdk"},
          {"reference": "openjdk-11-jdk-headless"},
          {"reference": "openjdk-11-jre"},
          {"reference": "openjdk-11-jre-headless"},
          {"reference": "openjdk-11-jre-zero"},
          {"reference": "openjdk-11-source"},
          {"reference": "openjdk-13"},
          {"reference": "openjdk-16"},
          {"reference": "openjdk-17"},
          {"reference": "openjdk-21"},
          {"reference": "openjdk-8"}
        ]
      }
    ]
  },
  "Ubuntu Linux-22.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "22.04",
        "pkgs": [
          {"reference": "openjdk-11-dbg"},
          {"reference": "openjdk-11-demo"},
          {"reference": "openjdk-11-doc"},
          {"reference": "openjdk-11-jdk"},
          {"reference": "openjdk-11-jdk-headless"},
          {"reference": "openjdk-11-jre"},
          {"reference": "openjdk-11-jre-headless"},
          {"reference": "openjdk-11-jre-zero"},
          {"reference": "openjdk-11-source"},
          {"reference": "openjdk-17"},
          {"reference": "openjdk-18"},
          {"reference": "openjdk-21"},
          {"reference": "openjdk-25"},
          {"reference": "openjdk-8"}
        ]
      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
          {"reference": "openjdk-17-dbg"},
          {"reference": "openjdk-17-demo"},
          {"reference": "openjdk-17-doc"},
          {"reference": "openjdk-17-jdk"},
          {"reference": "openjdk-17-jdk-headless"},
          {"reference": "openjdk-17-jre"},
          {"reference": "openjdk-17-jre-headless"},
          {"reference": "openjdk-17-jre-zero"},
          {"reference": "openjdk-17-source"},
          {"reference": "openjdk-21-dbg"},
          {"reference": "openjdk-21-demo"},
          {"reference": "openjdk-21-doc"},
          {"reference": "openjdk-21-jdk"},
          {"reference": "openjdk-21-jdk-headless"},
          {"reference": "openjdk-21-jre"},
          {"reference": "openjdk-21-jre-headless"},
          {"reference": "openjdk-21-jre-zero"},
          {"reference": "openjdk-21-source"},
          {"reference": "openjdk-21-testsupport"},
          {"reference": "openjdk-25"},
          {"reference": "openjdk-8"},
          {"reference": "openjdk-lts"}
        ]
      }
    ]
  },
  "Ubuntu Linux-26.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "26.04",
        "pkgs": [
          {"reference": "openjdk-17"},
          {"reference": "openjdk-17-crac"},
          {"reference": "openjdk-21"},
          {"reference": "openjdk-21-crac"},
          {"reference": "openjdk-25-dbg"},
          {"reference": "openjdk-25-demo"},
          {"reference": "openjdk-25-doc"},
          {"reference": "openjdk-25-jdk"},
          {"reference": "openjdk-25-jdk-headless"},
          {"reference": "openjdk-25-jre"},
          {"reference": "openjdk-25-jre-headless"},
          {"reference": "openjdk-25-jre-zero"},
          {"reference": "openjdk-25-jvmci-jdk"},
          {"reference": "openjdk-25-source"},
          {"reference": "openjdk-25-testsupport"},
          {"reference": "openjdk-8"},
          {"reference": "openjdk-lts"}
        ]
      }
    ]
  }
};

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');
}