USN-7254-1: OpenJDK 21 vulnerability

Releases

• Ubuntu 24.10
• Ubuntu 24.04 LTS
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS

Packages

• openjdk-21 - Open Source Java implementation

Details

It was discovered that the Hotspot component of OpenJDK 21 did not properly
handle API access under certain circumstances. An unauthenticated attacker
could possibly use this issue to access unauthorized resources and expose
sensitive information.

Update instructions

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

Ubuntu 24.10

• openjdk-21-jdk - 21.0.6+7-1~24.10.1
• openjdk-21-jdk-headless - 21.0.6+7-1~24.10.1
• openjdk-21-jre - 21.0.6+7-1~24.10.1
• openjdk-21-jre-headless - 21.0.6+7-1~24.10.1
• openjdk-21-jre-zero - 21.0.6+7-1~24.10.1

Ubuntu 24.04

• openjdk-21-jdk - 21.0.6+7-1~24.04.1
• openjdk-21-jdk-headless - 21.0.6+7-1~24.04.1
• openjdk-21-jre - 21.0.6+7-1~24.04.1
• openjdk-21-jre-headless - 21.0.6+7-1~24.04.1
• openjdk-21-jre-zero - 21.0.6+7-1~24.04.1

Ubuntu 22.04

• openjdk-21-jdk - 21.0.6+7-1~22.04.1
• openjdk-21-jdk-headless - 21.0.6+7-1~22.04.1
• openjdk-21-jre - 21.0.6+7-1~22.04.1
• openjdk-21-jre-headless - 21.0.6+7-1~22.04.1
• openjdk-21-jre-zero - 21.0.6+7-1~22.04.1

Ubuntu 20.04

• openjdk-21-jdk - 21.0.6+7-1~20.04.1
• openjdk-21-jdk-headless - 21.0.6+7-1~20.04.1
• openjdk-21-jre - 21.0.6+7-1~20.04.1
• openjdk-21-jre-headless - 21.0.6+7-1~20.04.1
• openjdk-21-jre-zero - 21.0.6+7-1~20.04.1

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

• CVE-2025-21502

Related notices

• USN-7252-1
• USN-7253-1
• USN-7255-1