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Ubuntu 25.10 OpenJDK 21 Critical Code Exec Issue USN-8002-1

ubuntu
Calendar Grey February 3, 2026
Dist Ubuntu Esm H88
Critical vulnerabilities in OpenJDK 21 affecting multiple Ubuntu releases require immediate security updates and fixes.
Several security issues were fixed in OpenJDK 21.

Summary

Several security issues were fixed in OpenJDK 21.

Software Description:

- openjdk-21: Open Source Java implementation

Details:

It was discovered that the RMI component of OpenJDK 21 would establish

RMI TCP endpoint connections to a remote host without setting an

endpoint identification algorithm. An unauthenticated remote attacker

could possibly use this issue to steal sensitive information.

(CVE-2026-21925)

Mingijung discovered that the AWT and JavaFX componenets of OpenJDK 21

could run programs if Desktop.browse() was supplied a filename as a

URI. An unauthenticated remote attacker could possibly use this issue

to execute arbitrary code. (CVE-2026-21932)

Zhihui Chen discovered that the Networking component of OpenJDK 21

was suceptible to a CRLF injection vulnerability via the HttpServer

class. An unauthenticated remote attacker could possibly use this

issue to modify files or leak sensitive information. (CVE-2026-21933)

Ireneusz Pastusiak discovered that the Security compon...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory information leak critical code execution Ubuntu openjdk

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  openjdk-21-jdk                  21.0.10+7-1~25.10
  openjdk-21-jdk-headless         21.0.10+7-1~25.10
  openjdk-21-jre                  21.0.10+7-1~25.10
  openjdk-21-jre-headless         21.0.10+7-1~25.10
  openjdk-21-jre-zero             21.0.10+7-1~25.10

Ubuntu 24.04 LTS
  openjdk-21-jdk                  21.0.10+7-1~24.04
  openjdk-21-jdk-headless         21.0.10+7-1~24.04
  openjdk-21-jre                  21.0.10+7-1~24.04
  openjdk-21-jre-headless         21.0.10+7-1~24.04
  openjdk-21-jre-zero             21.0.10+7-1~24.04

Ubuntu 22.04 LTS
  openjdk-21-jdk                  21.0.10+7-1~22.04
  openjdk-21-jdk-headless         21.0.10+7-1~22.04
  openjdk-21-jre                  21.0.10+7-1~22.04
  openjdk-21-jre-headless         21.0.10+7-1~22.04
  openjdk-21-jre-zero             21.0.10+7-1~22.04

Ubuntu 20.04 LTS
  openjdk-21-jdk                  21.0.10+7-1~20.04
                                  Available with Ubuntu Pro
  openjdk-21-jdk-headless         21.0.10+7-1~20.04
                                  Available with Ubuntu Pro
  openjdk-21-jre                  21.0.10+7-1~20.04
                                  Available with Ubuntu Pro
  openjdk-21-jre-headless         21.0.10+7-1~20.04
                                  Available with Ubuntu Pro
  openjdk-21-jre-zero             21.0.10+7-1~20.04
                                  Available with Ubuntu Pro

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart Java
applications to make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-8002-1

CVE-2026-21925, CVE-2026-21932, CVE-2026-21933, CVE-2026-21945

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8002-1

Topics%20covered

Topics Covered

security advisory information leak critical code execution Ubuntu openjdk

Package Information

https://launchpad.net/ubuntu/+source/openjdk-21/21.0.10+7-1~25.10
https://launchpad.net/ubuntu/+source/openjdk-21/21.0.10+7-1~22.04

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