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CVE-2025-21502VulnerabilityPublished Updated

Red Hat Security Advisory: java-17-openjdk security update for RHEL 9.0 and 9.2

Affects Red Hat java-17-openjdkSource GCVE Database

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Not known to be exploited.

Data as of 3 Nov 2026, 02:32 UTC

Severity
Medium

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

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

An update for java-17-openjdk is available for RHEL 9.0 and 9.2. Users should apply the update as detailed in the Red Hat advisory RHSA-2025:0423 and the referenced article https://access.redhat.com/articles/11258. The advisory provides instructions for configuring and selecting the default OpenJDK version on RHEL. Since the advisory is from Red Hat Product Security, applying the official update is the recommended remediation.

Description

A security update for the java-17-openjdk packages on Red Hat Enterprise Linux (RHEL) 9.0 and 9.2 addresses a vulnerability identified as CVE-2025-21502, which involves enhanced array handling in the JDK. This update coincides with Red Hat making OpenJDK 17 the default Java version on RHEL 9, as support for OpenJDK 11 has ended. The vulnerability is rated as having moderate security impact by Red Hat Product Security.

References

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