High [CVE-2026-21945] Enhance Certificate Checking (Oracle CPU 2026-01)
This high-severity Red Hat Linux advisory covers CVE-2026-21945 affecting Red Hat Build of OpenJDK 17.0.18, Red Hat Build of OpenJDK 21.0.10, Red Hat Build of OpenJDK 25.0.2.
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Summary
Enhance Certificate Checking (Oracle CPU 2026-01). Red Hat rates this important (CVSS 7.5).
Weakness: CWE-295. Affected package(s): java.
Resolved in Red Hat advisory RHSA-2026:0895 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Build of OpenJDK 17.0.18; Red Hat Build of OpenJDK 21.0.10; Red Hat Build of OpenJDK 25.0.2; Red Hat Build of OpenJDK 8u482; and 17 more.
- java-1.8.0-ibm-1:1.8.0.8.60-1.el8_10
- java-11-openjdk-1:11.0.30.0.7-1.el7_9
- java-25-openjdk-1:25.0.2.0.10-1.el10
- java-1.8.0-openjdk-1:1.8.0.482.b08-1.el7_9
- java-25-openjdk-windows
- java-21-openjdk-portable
- java-21-openjdk-1:21.0.10.0.7-1.el9
- java-1.8.0-openjdk-1:1.8.0.482.b08-1.el9
- java-21-openjdk-windows
- java-25-openjdk-1:25.0.2.0.10-1.el9
- java-21-openjdk-1:21.0.10.0.7-1.el8
- java-21-openjdk-1:21.0.10.0.7-1.el10
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:0895
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:0895 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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