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CVE-2025-21502VulnerabilityPublished Updated

Red Hat Security Advisory: java-11-openjdk ELS security update

Affects Red Hat java-11-openjdk ELSSource 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

Red Hat has released an updated java-11-openjdk package as part of the Extended Lifecycle Support for RHEL 7, 8, and 9. Users should apply this update following Red Hat's guidance at https://access.redhat.com/articles/11258. All running OpenJDK Java instances must be restarted for the update to take effect. This update addresses the vulnerability CVE-2025-21502. No additional mitigation steps are indicated in the advisory.

Description

A security update for the java-11-openjdk packages with Extended Lifecycle Support (ELS) for Red Hat Enterprise Linux 7, 8, and 9 addresses a vulnerability identified as CVE-2025-21502. The issue involves enhanced array handling in OpenJDK 11. This update is the initial ELS release for these Red Hat Enterprise Linux versions and requires restarting all running OpenJDK Java instances to take effect.

References

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