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RHEL 10 / 8 / 9 : java-21-openjdk (RHSA-2026:9689)

high Nessus Plugin ID 310121

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-2026:9689 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 crypto algorithm support (CVE-2026-22007)

 * JDK: Improve Kerberos credentialing (CVE-2026-22013)

 * JDK: Enhance Path Factories Redux (CVE-2026-22016)

 * JDK: Enhance Zip file reading (CVE-2026-22018)

 * JDK: Enhance certificate chain validation (CVE-2026-22021)

 * JDK: Updating FreeType 2.14.1 (CVE-2026-23865)

 * JDK: Enhance TLS connection handling (CVE-2026-34282)

 * JDK: Enhance key generation (CVE-2026-34268)

 Bug Fix(es):

 * When copying files, OpenJDK 21 prefers to use the copy_file_range native function for performance reasons, only falling back to sendfile when this fails. However, in previous OpenJDK 21 releases, a response of EOPNOTSUPP (operation not supported) did not cause the JDK to fall back to sendfile. This is rectified in this release. (RHEL-169617, RHEL-169951, RHEL-169952, RHEL-169942, RHEL-169953, RHEL-169945)

 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-2026:9689.

See Also

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

http://www.nessus.org/u?98651634

https://access.redhat.com/errata/RHSA-2026:9689

Plugin Details

Severity: High

ID: 310121

File Name: redhat-RHSA-2026-9689.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/24/2026

Updated: 4/24/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.1

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-22016

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

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 Ease: No known exploits are available

Patch Publication Date: 4/24/2026

Vulnerability Publication Date: 3/2/2026

Reference Information

CVE: CVE-2026-22007, CVE-2026-22013, CVE-2026-22016, CVE-2026-22018, CVE-2026-22021, CVE-2026-23865, CVE-2026-34268, CVE-2026-34282

CWE: 125, 319, 327, 611, 674, 835

RHSA: 2026:9689