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Linux Distros Unpatched Vulnerability : CVE-2026-91396

🗓️ 21 Oct 2026 00:00:00Reported by TenableType 
nessus
 nessus
🔗 www.tenable.com👁 4 Views

Unauthenticated attacker with network access can compromise Oracle Java SE and GraalVM.

Related
Refs
Code
ReporterTitlePublishedViews
Family
nessus
Tenable Nessus
Amazon Corretto Java 11.x < 11.0.33.0.9 Multiple Vulnerabilities
23 Oct 202600:00
–nessus
circl
Circl
CVE-2026-91396
21 Oct 202612:39
–circl
cnnvd
CNNVD
Oracle Java SE security vulnerabilities
19 Oct 202616:00
–cnnvd
cve
CVE
CVE-2026-91396
20 Oct 202621:25
–cve
cvelist
Cvelist
CVE-2026-91396
20 Oct 202621:25
–cvelist
debiancve
Debian CVE
CVE-2026-91396
20 Oct 202621:25
–debiancve
euvd
EUVD
EUVD-2026-106650
21 Oct 202600:33
–euvd
kaspersky
Kaspersky
KLA91365 Multiple vulnerabilities in Oracle Java
20 Oct 202600:00
–kaspersky
ncsc
NCSC
Several vulnerabilities exist in Oracle Java.
22 Oct 202612:04
–ncsc
nvd
NVD
CVE-2026-91396
20 Oct 202622:20
–nvd
Rows per page
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
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  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/23");

  script_cve_id("CVE-2026-91396");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-91396");

  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 Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of
    Oracle Java SE (component: Utility). Supported versions that are affected are Oracle Java SE: 8u503,
    8u503-perf, 11.0.32.1; Oracle GraalVM for JDK: 17.0.20.1 and 21.0.12.1; Oracle GraalVM Enterprise Edition:
    21.3.19.1.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via
    multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise
    Edition. Successful attacks of this vulnerability can result in unauthorized update, insert or delete
    access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible
    data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE, Oracle
    GraalVM for JDK, Oracle GraalVM Enterprise Edition. Note: This vulnerability can be exploited by using
    APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This
    vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start
    applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the
    internet) and rely on the Java sandbox for security. (CVE-2026-91396)

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-2026-91396");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2026-91396");
  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:C");
  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:L/A:L");
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  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-91396");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
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  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/10/20");
  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:canonical:ubuntu_linux:16.04:-:lts");
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  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
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  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-13");
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  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");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-1.8.0-ibm-jdbc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-1.8.0-ibm-plugin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-1.8.0-ibm-src");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-1.8.0-ibm-webstart");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-1.8.0-openjdk");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-1.8.0-openjdk-headless-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-1.8.0-openjdk-headless-fastdebug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-1.8.0-openjdk-headless-slowdebug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-1.8.0-openjdk-javadoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-1.8.0-openjdk-javadoc-debug");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-1.8.0-openjdk-src-debug");
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  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/Red Hat Enterprise Linux-7", "Host/OS/Red Hat Enterprise Linux-8", "Host/OS/Red Hat Enterprise Linux-9", "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/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 = {
  "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": [
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          {"reference": "openjdk-11-demo"},
          {"reference": "openjdk-11-doc"},
          {"reference": "openjdk-11-jdk"},
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          {"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"}
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      }
    ]
  },
  "Ubuntu Linux-24.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "24.04",
        "pkgs": [
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          {"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"}
        ]
      }
    ]
  },
  "CentOS Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "java-1.8.0-openjdk"},
          {"reference": "java-1.8.0-openjdk-accessibility"},
          {"reference": "java-1.8.0-openjdk-accessibility-debug"},
          {"reference": "java-1.8.0-openjdk-debug"},
          {"reference": "java-1.8.0-openjdk-demo"},
          {"reference": "java-1.8.0-openjdk-demo-debug"},
          {"reference": "java-1.8.0-openjdk-devel"},
          {"reference": "java-1.8.0-openjdk-devel-debug"},
          {"reference": "java-1.8.0-openjdk-headless"},
          {"reference": "java-1.8.0-openjdk-headless-debug"},
          {"reference": "java-1.8.0-openjdk-javadoc"},
          {"reference": "java-1.8.0-openjdk-javadoc-debug"},
          {"reference": "java-1.8.0-openjdk-javadoc-zip"},
          {"reference": "java-1.8.0-openjdk-javadoc-zip-debug"},
          {"reference": "java-1.8.0-openjdk-src"},
          {"reference": "java-1.8.0-openjdk-src-debug"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-7": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "7",
        "pkgs": [
          {"reference": "java-1.8.0-openjdk"},
          {"reference": "java-1.8.0-openjdk-accessibility"},
          {"reference": "java-1.8.0-openjdk-accessibility-debug"},
          {"reference": "java-1.8.0-openjdk-debug"},
          {"reference": "java-1.8.0-openjdk-demo"},
          {"reference": "java-1.8.0-openjdk-demo-debug"},
          {"reference": "java-1.8.0-openjdk-devel"},
          {"reference": "java-1.8.0-openjdk-devel-debug"},
          {"reference": "java-1.8.0-openjdk-headless"},
          {"reference": "java-1.8.0-openjdk-headless-debug"},
          {"reference": "java-1.8.0-openjdk-javadoc"},
          {"reference": "java-1.8.0-openjdk-javadoc-debug"},
          {"reference": "java-1.8.0-openjdk-javadoc-zip"},
          {"reference": "java-1.8.0-openjdk-javadoc-zip-debug"},
          {"reference": "java-1.8.0-openjdk-src"},
          {"reference": "java-1.8.0-openjdk-src-debug"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "java-1.8.0-ibm"},
          {"reference": "java-1.8.0-ibm-demo"},
          {"reference": "java-1.8.0-ibm-devel"},
          {"reference": "java-1.8.0-ibm-headless"},
          {"reference": "java-1.8.0-ibm-jdbc"},
          {"reference": "java-1.8.0-ibm-plugin"},
          {"reference": "java-1.8.0-ibm-src"},
          {"reference": "java-1.8.0-ibm-webstart"},
          {"reference": "java-1.8.0-openjdk"},
          {"reference": "java-1.8.0-openjdk-accessibility"},
          {"reference": "java-1.8.0-openjdk-accessibility-fastdebug"},
          {"reference": "java-1.8.0-openjdk-accessibility-slowdebug"},
          {"reference": "java-1.8.0-openjdk-demo"},
          {"reference": "java-1.8.0-openjdk-demo-fastdebug"},
          {"reference": "java-1.8.0-openjdk-demo-slowdebug"},
          {"reference": "java-1.8.0-openjdk-devel"},
          {"reference": "java-1.8.0-openjdk-devel-fastdebug"},
          {"reference": "java-1.8.0-openjdk-devel-slowdebug"},
          {"reference": "java-1.8.0-openjdk-fastdebug"},
          {"reference": "java-1.8.0-openjdk-headless"},
          {"reference": "java-1.8.0-openjdk-headless-fastdebug"},
          {"reference": "java-1.8.0-openjdk-headless-slowdebug"},
          {"reference": "java-1.8.0-openjdk-javadoc"},
          {"reference": "java-1.8.0-openjdk-javadoc-zip"},
          {"reference": "java-1.8.0-openjdk-slowdebug"},
          {"reference": "java-1.8.0-openjdk-src"},
          {"reference": "java-1.8.0-openjdk-src-fastdebug"},
          {"reference": "java-1.8.0-openjdk-src-slowdebug"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"reference": "java-1.8.0-ibm"},
          {"reference": "java-1.8.0-ibm-demo"},
          {"reference": "java-1.8.0-ibm-devel"},
          {"reference": "java-1.8.0-ibm-headless"},
          {"reference": "java-1.8.0-ibm-jdbc"},
          {"reference": "java-1.8.0-ibm-plugin"},
          {"reference": "java-1.8.0-ibm-src"},
          {"reference": "java-1.8.0-ibm-webstart"},
          {"reference": "java-1.8.0-openjdk"},
          {"reference": "java-1.8.0-openjdk-accessibility"},
          {"reference": "java-1.8.0-openjdk-accessibility-fastdebug"},
          {"reference": "java-1.8.0-openjdk-accessibility-slowdebug"},
          {"reference": "java-1.8.0-openjdk-demo"},
          {"reference": "java-1.8.0-openjdk-demo-fastdebug"},
          {"reference": "java-1.8.0-openjdk-demo-slowdebug"},
          {"reference": "java-1.8.0-openjdk-devel"},
          {"reference": "java-1.8.0-openjdk-devel-fastdebug"},
          {"reference": "java-1.8.0-openjdk-devel-slowdebug"},
          {"reference": "java-1.8.0-openjdk-fastdebug"},
          {"reference": "java-1.8.0-openjdk-headless"},
          {"reference": "java-1.8.0-openjdk-headless-fastdebug"},
          {"reference": "java-1.8.0-openjdk-headless-slowdebug"},
          {"reference": "java-1.8.0-openjdk-javadoc"},
          {"reference": "java-1.8.0-openjdk-javadoc-zip"},
          {"reference": "java-1.8.0-openjdk-slowdebug"},
          {"reference": "java-1.8.0-openjdk-src"},
          {"reference": "java-1.8.0-openjdk-src-fastdebug"},
          {"reference": "java-1.8.0-openjdk-src-slowdebug"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"reference": "java-1.8.0-openjdk"},
          {"reference": "java-1.8.0-openjdk-demo"},
          {"reference": "java-1.8.0-openjdk-demo-fastdebug"},
          {"reference": "java-1.8.0-openjdk-demo-slowdebug"},
          {"reference": "java-1.8.0-openjdk-devel"},
          {"reference": "java-1.8.0-openjdk-devel-fastdebug"},
          {"reference": "java-1.8.0-openjdk-devel-slowdebug"},
          {"reference": "java-1.8.0-openjdk-fastdebug"},
          {"reference": "java-1.8.0-openjdk-headless"},
          {"reference": "java-1.8.0-openjdk-headless-fastdebug"},
          {"reference": "java-1.8.0-openjdk-headless-slowdebug"},
          {"reference": "java-1.8.0-openjdk-javadoc"},
          {"reference": "java-1.8.0-openjdk-javadoc-zip"},
          {"reference": "java-1.8.0-openjdk-slowdebug"},
          {"reference": "java-1.8.0-openjdk-src"},
          {"reference": "java-1.8.0-openjdk-src-fastdebug"},
          {"reference": "java-1.8.0-openjdk-src-slowdebug"}
        ]
      }
    ]
  }
};

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');
}

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23 Oct 2026 00:00Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.16.5
EPSS0.00332
SSVC
4