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Ubuntu 25.10 OpenJDK 17 Critical Risk RCE DoS USN-7998-1

ubuntu
Calendar Grey February 3, 2026
Scroller Ubuntu
Several security issues fixed in OpenJDK 17 could permit remote code execution and information exposure in Ubuntu updates.
Several security issues were fixed in OpenJDK 17.

Summary

Several security issues were fixed in OpenJDK 17.

Software Description:

- openjdk-17: Open Source Java implementation

Details:

It was discovered that the RMI component of OpenJDK 17 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 17

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 17

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 remote code execution DoS Ubuntu information disclosure openjdk

Update Instructions

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

Ubuntu 25.10
  openjdk-17-jdk                  17.0.18+8-1~25.10.1
  openjdk-17-jdk-headless         17.0.18+8-1~25.10.1
  openjdk-17-jre                  17.0.18+8-1~25.10.1
  openjdk-17-jre-headless         17.0.18+8-1~25.10.1
  openjdk-17-jre-zero             17.0.18+8-1~25.10.1

Ubuntu 24.04 LTS
  openjdk-17-jdk                  17.0.18+8-1~24.04.1
  openjdk-17-jdk-headless         17.0.18+8-1~24.04.1
  openjdk-17-jre                  17.0.18+8-1~24.04.1
  openjdk-17-jre-headless         17.0.18+8-1~24.04.1
  openjdk-17-jre-zero             17.0.18+8-1~24.04.1

Ubuntu 22.04 LTS
  openjdk-17-jdk                  17.0.18+8-1~22.04.1
  openjdk-17-jdk-headless         17.0.18+8-1~22.04.1
  openjdk-17-jre                  17.0.18+8-1~22.04.1
  openjdk-17-jre-headless         17.0.18+8-1~22.04.1
  openjdk-17-jre-zero             17.0.18+8-1~22.04.1

Ubuntu 20.04 LTS
  openjdk-17-jdk                  17.0.18+8-1~20.04
                                  Available with Ubuntu Pro
  openjdk-17-jdk-headless         17.0.18+8-1~20.04
                                  Available with Ubuntu Pro
  openjdk-17-jre                  17.0.18+8-1~20.04
                                  Available with Ubuntu Pro
  openjdk-17-jre-headless         17.0.18+8-1~20.04
                                  Available with Ubuntu Pro
  openjdk-17-jre-zero             17.0.18+8-1~20.04
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  openjdk-17-jdk                  17.0.18+8-1~18.04
                                  Available with Ubuntu Pro
  openjdk-17-jdk-headless         17.0.18+8-1~18.04
                                  Available with Ubuntu Pro
  openjdk-17-jre                  17.0.18+8-1~18.04
                                  Available with Ubuntu Pro
  openjdk-17-jre-headless         17.0.18+8-1~18.04
                                  Available with Ubuntu Pro
  openjdk-17-jre-zero             17.0.18+8-1~18.04
                                  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-7998-1

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

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7998-1

Topics%20covered

Topics Covered

security advisory remote code execution DoS Ubuntu information disclosure openjdk

Package Information

https://launchpad.net/ubuntu/+source/openjdk-17/17.0.18+8-1~25.10.1
https://launchpad.net/ubuntu/+source/openjdk-17/17.0.18+8-1~24.04.1

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