RHSA-2026:20568 - Security Advisory

Topic

An update for jmc is now available for Red Hat Enterprise Linux 9.

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

JDK Mission Control is a powerful profiler for HotSpot JVMs and has an advanced set of tools that enables efficient and detailed analysis of the extensive data collected by JDK Flight Recorder. The tool chain enables developers and administrators to collect and analyze data from Java applications running locally or deployed in production environments.

Security Fix(es):

• lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing (CVE-2025-66566)
• org.eclipse.jetty/jetty-http: HTTP request smuggling via chunked extension quoted-string parsing (CVE-2026-2332)

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

For details on how to apply this update, which includes the changes described in this advisory, refer to:

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

Affected Products

• Red Hat CodeReady Linux Builder for x86_64 9 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 9.8 x86_64

Fixes

• BZ - 2419500 - CVE-2025-66566 lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing
• BZ - 2458187 - CVE-2026-2332 org.eclipse.jetty/jetty-http: HTTP request smuggling via chunked extension quoted-string parsing

CVEs

• CVE-2025-66566
• CVE-2026-2332

References

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