The following advisory data is extracted from:

https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_10873.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff




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Red Hat Security Advisory

Synopsis:           Important: java-21-openjdk security update
Advisory ID:        RHSA-2025:10873-03
Product:            Red Hat Enterprise Linux
Advisory URL:       https://access.redhat.com/errata/RHSA-2025:10873
Issue date:         2025-07-16
Revision:           03
CVE Names:          CVE-2025-30749
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Summary: 

An update for java-21-openjdk is now available for Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Enterprise Linux 9, and Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.




Description:

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

Security Fix(es):

* JDK: Better Glyph drawing (CVE-2025-30749)
* JDK: Enhance TLS protocol support (CVE-2025-30754)
* JDK: Improve HTTP client header handling (CVE-2025-50059)
* JDK: Better Glyph drawing redux (CVE-2025-50106)

Bug Fix(es):

* In Red Hat Enterprise Linux 9 and Red Hat Enterprise Linux 10 systems, the default graphical display system is Wayland. The use of Wayland in these systems causes a failure in the traditional X11 method that java.awt.Robot uses to take a screen capture, producing a blank image. With this update, the RPM now recommends installing the PipeWire package, which the JDK can use to take screen captures in Wayland systems (RHEL-102683, RHEL-102684, RHEL-102685)
* On NUMA systems, the operating system can choose to migrate a task from one NUMA node to another. In the G1 garbage collector, G1AllocRegion objects are associated with NUMA nodes. The G1Allocator code assumes that obtaining the G1AllocRegion object for the current thread is sufficient, but OS scheduling can lead to arbitrary changes in the NUMA-to-thread association. This can cause crashes when the G1AllocRegion being used changes mid-operation. This update resolves this issue by always using the same NUMA node and associated G1AllocRegion object throughout an operation. (RHEL-90307, RHEL-90308, RHEL-90311)

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.


Solution:

https://access.redhat.com/articles/11258



CVEs:

CVE-2025-30749

References:

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