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Linux Distros Unpatched Vulnerability : CVE-2026-87291

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

Unauthenticated read access to data in Oracle Java SE Networking component.

Related
Refs
Code
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-87291
21 Oct 202609:06
–circl
cve
CVE
CVE-2026-87291
20 Oct 202621:23
–cve
cvelist
Cvelist
CVE-2026-87291
20 Oct 202621:23
–cvelist
debiancve
Debian CVE
CVE-2026-87291
20 Oct 202621:23
–debiancve
euvd
EUVD
EUVD-2026-106332
21 Oct 202600:32
–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-2026-87291
20 Oct 202622:20
–nvd
oracle
Oracle
Oracle Critical Patch Update Advisory - October 2026
20 Oct 202600:00
–oracle
osv_debian
osv_debian
DEBIAN-CVE-2026-87291
22 Oct 202600:47
–osv_debian
Rows per page
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(370045);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/22");

  script_cve_id("CVE-2026-87291");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2026-87291");

  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 Oracle Java SE (component: Networking). Supported versions that are affected are Oracle
    Java SE: 21.0.12.1, 25.0.4.1 and 27. Easily exploitable vulnerability allows unauthenticated attacker with
    network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this
    vulnerability can result in unauthorized read access to a subset of Oracle Java SE accessible data. Note:
    This vulnerability can only be exploited by supplying data to APIs in the specified Component without
    using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service.
    (CVE-2026-87291)

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-2026-87291");
  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:P/I:N/A:N");
  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:L/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-87291");

  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:"2026/10/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/21");

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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:java-25-openjdk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:java-25-openjdk-crypto-adapter");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-21-ibm-semeru-certified-jdk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-21-ibm-semeru-certified-jdk-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-21-ibm-semeru-certified-jdk-headless");
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  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-devel-slowdebug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-fastdebug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-headless");
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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-8", "Host/OS/Red Hat Enterprise Linux-10", "Host/OS/Red Hat Enterprise Linux-8", "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/CentOS/rpm-list")) && empty_or_null(get_one_kb_item("Host/RedHat/rpm-list"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Red Hat Enterprise Linux-10": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "10",
        "pkgs": [
          {"reference": "java-21-ibm-semeru-certified-jdk"},
          {"reference": "java-21-ibm-semeru-certified-jdk-devel"},
          {"reference": "java-21-ibm-semeru-certified-jdk-headless"},
          {"reference": "java-21-ibm-semeru-certified-jdk-jmods"},
          {"reference": "java-21-ibm-semeru-certified-jdk-src"},
          {"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"}
        ]
      }
    ]
  },
  "CentOS Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"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"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-8": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "8",
        "pkgs": [
          {"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"}
        ]
      }
    ]
  },
  "Red Hat Enterprise Linux-9": {
    "package_manager": "rpm-list",
    "constraints": [
      {
        "release": "9",
        "pkgs": [
          {"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"}
        ]
      }
    ]
  }
};

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

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22 Oct 2026 00:00Current
6.9Medium risk
Vulners AI Score6.9
CVSS 3.15.3
EPSS0.00316
0