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RHEL 7 / 8 / 9 : java-11-openjdk ELS (RHSA-2026:0847)

high Nessus Plugin ID 295026

Synopsis

The remote Red Hat host is missing one or more security updates for java-11-openjdk ELS.

Description

The remote Redhat Enterprise Linux 7 / 8 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:0847 advisory.

 The java-11-openjdk packages provide the OpenJDK 11 Java Runtime Environment and the OpenJDK 11 Java Software Development Kit.

 This release contains OpenJDK 11 with Extended Lifecycle Support for Red Hat Enterprise Linux versions 7, 8, and 9.

 Security Fix(es):

 * JDK: LIBPNG heap buffer overflow (CVE-2025-65018)
 * JDK: LIBPNG buffer overflow (CVE-2025-64720)
 * JDK: Improve JMX connections (CVE-2026-21925)
 * JDK: Improve HttpServer Request handling (CVE-2026-21933)
 * JDK: Enhance Certificate Checking (CVE-2026-21945)

 For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL java-11-openjdk ELS package based on the guidance in RHSA-2026:0847.

See Also

https://access.redhat.com/security/updates/classification/#important

http://www.nessus.org/u?2ee3b51a

https://access.redhat.com/errata/RHSA-2026:0847

Plugin Details

Severity: High

ID: 295026

File Name: redhat-RHSA-2026-0847.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/22/2026

Updated: 1/22/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2026-21933

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.4

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS Score Source: CVE-2025-65018

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-debug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-javadoc-debug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-headless-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-demo, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-devel-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-src-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-javadoc-zip, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-slowdebug, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-jmods-debug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-javadoc, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-src-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-static-libs-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-javadoc-zip-debug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-devel-debug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-src, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-static-libs, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-static-libs-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-headless, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-jmods, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-jmods-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-fastdebug, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-src-debug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-demo-debug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-devel-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-headless-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-static-libs-debug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-demo-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-headless-debug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-jmods-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-devel, p-cpe:/a:redhat:enterprise_linux:java-11-openjdk-demo-slowdebug

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/21/2026

Vulnerability Publication Date: 11/24/2025

Reference Information

CVE: CVE-2025-64720, CVE-2025-65018, CVE-2026-21925, CVE-2026-21933, CVE-2026-21945

CWE: 125, 295, 322, 787, 93

RHSA: 2026:0847