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CVE-2025-21587VulnerabilityPublished Updated

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

Affects Red Hat java-11-openjdk ELSSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2025-21587· High 7.4

Not known to be exploited · CVSS 7.4 High.

Data as of 3 Nov 2026, 10:57 UTC

CVSS 3.1 base score
7.4High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.8% chance of exploitation in 30 days – higher than 57% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 15 Apr 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 3 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Mavencom.oracle.java/java-sepkg:maven/com.oracle.java/java-seOther threatsAffected
  • 11.0.26 – 24
4 affected builds
Fixed in–
Mavencom.oracle.graalvm/graalvm-jdkpkg:maven/com.oracle.graalvm/graalvm-jdkOther threatsAffected
  • =17.0.14
  • =21.0.6
  • =24
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released an official security update for java-11-openjdk with Extended Lifecycle Support for RHEL 7, 8, and 9. Users should apply the update as described in the Red Hat advisory and restart all running OpenJDK Java instances to ensure the fixes take effect. No additional mitigation steps are indicated.

Description

Red Hat has released a security update for the java-11-openjdk packages with Extended Lifecycle Support for Red Hat Enterprise Linux 7, 8, and 9. The update addresses three security issues: improved TLS connection support (CVE-2025-21587), enhanced compiler transformations (CVE-2025-30691), and improved Buffered Image handling (CVE-2025-30698). The update requires restarting all running OpenJDK Java instances to take effect.

References

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