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RHEL 10 / 8 / 9 : java-21-openjdk (RHSA-2026:0928)

high Nessus Plugin ID 295326

Synopsis

The remote Red Hat host is missing one or more security updates for java-21-openjdk.

Description

The remote Redhat Enterprise Linux 10 / 8 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:0928 advisory.

 The OpenJDK 21 packages provide the OpenJDK 21 Java Runtime Environment and the OpenJDK 21 Java Software Development Kit.

 Security Fix(es):

 * JDK: Improve JMX connections (CVE-2026-21925)

 * JDK: Improve HttpServer Request handling (CVE-2026-21933)

 * JDK: Enhance Certificate Checking (CVE-2026-21945)

 * libpng: LIBPNG buffer overflow (CVE-2025-64720)

 * libpng: LIBPNG heap buffer overflow (CVE-2025-65018)

 Bug Fix(es):

 * When using a P11SecretKey for both signing and encryption in FIPS mode, the FIPS PKCS11 provider would fail with a CKR_ATTRIBUTE_VALUE_INVALID error. This was due to the default configuration not applying the CKA_ENCRYPT=true attribute to the key. The configuration in this release is updated to include this attribute. (RHEL-142860, RHEL-142876, RHEL-142877, RHEL-142878, RHEL-142879, RHEL-142880)

 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-21-openjdk package based on the guidance in RHSA-2026:0928.

See Also

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

http://www.nessus.org/u?c76d61e6

https://access.redhat.com/errata/RHSA-2026:0928

Plugin Details

Severity: High

ID: 295326

File Name: redhat-RHSA-2026-0928.nasl

Version: 1.1

Type: local

Agent: unix

Published: 1/22/2026

Updated: 1/22/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, 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-21-openjdk-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-devel, cpe:/o:redhat:enterprise_linux:10.1, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-static-libs, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-jmods-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-src-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-headless, cpe:/o:redhat:enterprise_linux:9, cpe:/o:redhat:rhel_eus:8.10, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-demo, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-devel-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-jmods, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-demo-slowdebug, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-devel-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-headless-fastdebug, cpe:/o:redhat:rhel_eus:9.6, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-headless-slowdebug, cpe:/o:redhat:enterprise_linux_eus:10.0, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-demo-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-jmods-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-static-libs-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-src, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-src-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-static-libs-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-javadoc, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk, cpe:/o:redhat:rhel_eus:9.4, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-javadoc-zip, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-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: 1/22/2026

Vulnerability Publication Date: 11/11/2025

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: 2026:0928