RHEL 10 / 8 / 9 : java-21-openjdk (RHSA-2026:42895)

high Nessus Plugin ID 329192

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-2026:42895 advisory.

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

Security Fix(es):

* JDK: Enhance TLS certificate handling (CVE-2026-46968)

* JDK: Improve DTLS handshaking (CVE-2026-46917)

* JDK: Enhance JPEG handling (CVE-2026-47010)

* JDK: Enhance XBM image support (CVE-2026-47021)

* JDK: Enhance Jar file processing (CVE-2026-47027)

* JDK: Improve certification checking (CVE-2026-60147)

* JDK: Enhance AWT ImagingLib (CVE-2026-47059)

* JDK: Enhance Jar handling (CVE-2026-47063)

* JDK: Update LCMS to 2.19 (CVE-2026-41254)

Enhancement(s):

* For the last couple of years, OpenJDK has used a single build shared among multiple RPMs and a tarball available on the customer portal. The single portable build has a release number ('p') and each RPM has its own release number ('r'). However, the RPM naming only showed the RPM release number, while the version output from the build showed the portable release number, making it unclear that they were different numbers. From this release onwards, a release field of the form 'p.r' is always used for RPMs and the version output shows 'p'. (RHEL-212337, RHEL-212338, RHEL-212339, RHEL-212340, RHEL-212342, RHEL-212343)

Bug Fix(es):

* In previous releases, the RPM did not correctly own the subdirectories used for documentation in /usr/share/doc and /usr/share/javadoc. This is fixed in this release, so these subdirectories will be removed when the package is uninstalled. (RHEL-212353, RHEL-212359, RHEL-212360, RHEL-212361)

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-2026:42895.

Plugin Details

Severity: High

ID: 329192

File Name: redhat-RHSA-2026-42895.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 7/23/2026

Updated: 7/23/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-47063

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

CVSS Score Source: CVE-2026-41254

Vulnerability Information

CPE: cpe:/o:redhat:enterprise_linux:10.2, cpe:/o:redhat:enterprise_linux:10, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, cpe:/o:redhat:enterprise_linux_eus:10.0, cpe:/o:redhat:rhel_e4s:9.4, cpe:/o:redhat:rhel_eus:8.10, cpe:/o:redhat:rhel_eus:9.6, cpe:/o:redhat:rhel_eus:9.8, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-demo-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-demo-slowdebug, 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-devel-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-devel, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-headless-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-headless-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-headless, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-javadoc-zip, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-javadoc, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-jmods-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-jmods-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-jmods, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-src-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-src-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-src, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-static-libs-fastdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-static-libs-slowdebug, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk-static-libs, p-cpe:/a:redhat:enterprise_linux:java-21-openjdk

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: 7/23/2026

Vulnerability Publication Date: 4/18/2026

Reference Information

CVE: CVE-2026-41254, CVE-2026-46917, CVE-2026-46968, CVE-2026-47010, CVE-2026-47021, CVE-2026-47027, CVE-2026-47059, CVE-2026-47063, CVE-2026-60147

CWE: 1333, 190, 295, 347, 400, 476, 787

RHSA: 2026:42895

Detections

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