Issued:
2026-01-26
Updated:
2026-01-26

RHSA-2026:0899 - Important: OpenJDK 21.0.10 Security Update for Portable Linux Builds

Synopsis

Important: OpenJDK 21.0.10 Security Update for Portable Linux Builds

Type/Severity

Security Advisory Important

Topic

An update is now available for OpenJDK.

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.

This release of the Red Hat build of OpenJDK 21 (21.0.10) for portable Linux serves as a replacement for the Red Hat build of OpenJDK 21 (21.0.9) and includes security and bug fixes as well as enhancements. For further information, refer to the release notes linked to in the References section.

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. (OPENJDK-4397)

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

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

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

Affected Products

ProductVersionArch
OpenJDK Java (for Middleware)1x86_64

Fixes

(none)

CVEs

References

Additional information