What is RHSA-2026:1823?

RHSA-2026:1823 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: JMC bug fix and enhancement update

Which CVE IDs does RHSA-2026:1823 cover?

RHSA-2026:1823 covers the following CVE IDs: CVE-2025-66566. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:1823?

RHSA-2026:1823 has a CVSS v3 base score of 7.5, published by Red Hat Product Security.

Which products are affected by RHSA-2026:1823?

RHSA-2026:1823 affects 3 products, including: Red Hat CodeReady Linux Builder EUS (v.9.4); jmc-0:8.2.0-17.el9_4.2.src as a component of Red Hat CodeReady Linux Builder EUS (v.9.4); jmc-0:8.2.0-17.el9_4.2.x86_64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.4).

RHSA-2026:1823HighCVSS 7.5

Red Hat Security Advisory: JMC bug fix and enhancement update

Vendor

Red Hat Product Security

Published

February 3, 2026

Last Modified

July 30, 2026

🔗 CVE IDs covered (1)

CVE-2025-66566 →

📋 Description

CVE-2025-66566 — lz4-java: lz4-java: Information Disclosure via Insufficient Output Buffer Clearing

🎯 Affected products3

Red Hat CodeReady Linux Builder EUS (v.9.4)
jmc-0:8.2.0-17.el9_4.2.src as a component of Red Hat CodeReady Linux Builder EUS (v.9.4)
jmc-0:8.2.0-17.el9_4.2.x86_64 as a component of Red Hat CodeReady Linux Builder EUS (v.9.4)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258

🔗 References (4)

selfhttps://access.redhat.com/errata/RHSA-2026:1823
externalhttps://access.redhat.com/security/updates/classification/#important
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2419500
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_1823.json