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[USN-8783-1] OpenJDK 25 vulnerabilities

Posted on 22 September 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8783-1
September 21, 2026

openjdk-25 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in OpenJDK 25.

Software Description:
- openjdk-25: Open Source Java implementation

Details:

Weber Leon discovered that the 2D component of OpenJDK 25 did not
correctly handle user authentication. A remote attacker could possibly
use this issue to cause a denial of service. (CVE-2026-70906)

Kai Aizen discovered that the Networking component of OpenJDK 25 did not
correctly handle user authentication. A remote attacker could possibly
use this issue to leak sensitive information. (CVE-2026-61308)

It was discovered that the JSSE component of OpenJDK 25 did not correctly
handle user authentication. A remote attacker could possibly use this
issue to cause a denial of service. (CVE-2026-70907)

It was discovered that the Security component of OpenJDK 25 did not
correctly handle user authentication. A remote attacker could possibly
use this issue to leak sensitive information. (CVE-2026-60589)

Update instructions:

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

Ubuntu 26.04 LTS
openjdk-25-jdk 25.0.4.1+1-1~26.04.4
openjdk-25-jdk-headless 25.0.4.1+1-1~26.04.4
openjdk-25-jre 25.0.4.1+1-1~26.04.4
openjdk-25-jre-headless 25.0.4.1+1-1~26.04.4
openjdk-25-jre-zero 25.0.4.1+1-1~26.04.4

Ubuntu 24.04 LTS
openjdk-25-jdk 25.0.4.1+1-1~24.04.4
openjdk-25-jdk-headless 25.0.4.1+1-1~24.04.4
openjdk-25-jre 25.0.4.1+1-1~24.04.4
openjdk-25-jre-headless 25.0.4.1+1-1~24.04.4
openjdk-25-jre-zero 25.0.4.1+1-1~24.04.4

Ubuntu 22.04 LTS
openjdk-25-jdk 25.0.4.1+1-1~22.04.4
openjdk-25-jdk-headless 25.0.4.1+1-1~22.04.4
openjdk-25-jre 25.0.4.1+1-1~22.04.4
openjdk-25-jre-headless 25.0.4.1+1-1~22.04.4
openjdk-25-jre-zero 25.0.4.1+1-1~22.04.4

After a standard system update you need to restart any running
Java applications to make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8783-1
CVE-2026-60589, CVE-2026-61308, CVE-2026-70906, CVE-2026-70907

Package Information:
https://launchpad.net/ubuntu/+source/openjdk-25/25.0.4.1+1-1~26.04.4
https://launchpad.net/ubuntu/+source/openjdk-25/25.0.4.1+1-1~24.04.4
https://launchpad.net/ubuntu/+source/openjdk-25/25.0.4.1+1-1~22.04.4

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