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CVE-2025-21502VulnerabilityPublished Updated

Red Hat Security Advisory: OpenJDK 21.0.6 Security Update for Windows Builds

Affects Red Hat OpenJDK 21.0.6Source GCVE Database

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Not known to be exploited · fixed in Red Hat package updates : update Red Hat OpenJDK 21.0.6 when convenient.

Data as of 3 Nov 2026, 02:32 UTC

Severity
Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

Patch
Available – fixed in 21.0.6

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Jan 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.

What to do

AI-suggested

A security update is available in Red Hat build of OpenJDK 21 version 21.0.6 for Windows, which addresses CVE-2025-21502. Users should upgrade from version 21.0.5 to 21.0.6 after applying all previously released relevant errata. Refer to Red Hat's official update instructions for proper application of this update.

Description

A security update for the Red Hat build of OpenJDK 21 (version 21.0.6) for Windows addresses a moderate severity vulnerability identified as CVE-2025-21502. The update enhances array handling in the Java Development Kit (JDK) to fix this issue. This release replaces the previous version 21.0.5 and includes security and bug fixes.

References

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