=========================================================================
Ubuntu Security Notice USN-7668-1
July 24, 2025

openjdk-21 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.04
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in OpenJDK 21.

Software Description:
- openjdk-21: Open Source Java implementation

Details:

It was discovered that the 2D component of OpenJDK 21 did not properly
manage memory under certain circumstances. An attacker could possibly
use this issue to cause a denial of service or execute arbitrary code.
(CVE-2025-30749, CVE-2025-50106)

Mashroor Hasan Bhuiyan discovered that the JSSE component of OpenJDK
21 did not properly manage TLS 1.3 handshakes under certain
circumstances. An attacker could possibly use this issue to obtain
sensitive information. (CVE-2025-30754)

Martin van Wingerden and Violeta Georgieva of Broadcom discovered
that the Networking component of OpenJDK 24 did not properly
manage network connections under certain circumstances. An attacker
could possibly use this issue to obtain sensitive information.
(CVE-2025-50059)

Update instructions:

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

Ubuntu 25.04
  openjdk-21-jdk                  21.0.8+9~us1-0ubuntu1~25.04.1
  openjdk-21-jdk-headless         21.0.8+9~us1-0ubuntu1~25.04.1
  openjdk-21-jre                  21.0.8+9~us1-0ubuntu1~25.04.1
  openjdk-21-jre-headless         21.0.8+9~us1-0ubuntu1~25.04.1
  openjdk-21-jre-zero             21.0.8+9~us1-0ubuntu1~25.04.1

Ubuntu 24.04 LTS
  openjdk-21-jdk                  21.0.8+9~us1-0ubuntu1~24.04.1
  openjdk-21-jdk-headless         21.0.8+9~us1-0ubuntu1~24.04.1
  openjdk-21-jre                  21.0.8+9~us1-0ubuntu1~24.04.1
  openjdk-21-jre-headless         21.0.8+9~us1-0ubuntu1~24.04.1
  openjdk-21-jre-zero             21.0.8+9~us1-0ubuntu1~24.04.1

Ubuntu 22.04 LTS
  openjdk-21-jdk                  21.0.8+9~us1-0ubuntu1~22.04.1
  openjdk-21-jdk-headless         21.0.8+9~us1-0ubuntu1~22.04.1
  openjdk-21-jre                  21.0.8+9~us1-0ubuntu1~22.04.1
  openjdk-21-jre-headless         21.0.8+9~us1-0ubuntu1~22.04.1
  openjdk-21-jre-zero             21.0.8+9~us1-0ubuntu1~22.04.1

Ubuntu 20.04 LTS
  openjdk-21-jdk                  21.0.8+9~us1-0ubuntu1~20.04.1
                                  Available with Ubuntu Pro
  openjdk-21-jdk-headless         21.0.8+9~us1-0ubuntu1~20.04.1
                                  Available with Ubuntu Pro
  openjdk-21-jre                  21.0.8+9~us1-0ubuntu1~20.04.1
                                  Available with Ubuntu Pro
  openjdk-21-jre-headless         21.0.8+9~us1-0ubuntu1~20.04.1
                                  Available with Ubuntu Pro
  openjdk-21-jre-zero             21.0.8+9~us1-0ubuntu1~20.04.1
                                  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-7668-1
  CVE-2025-30749, CVE-2025-30754, CVE-2025-50059, CVE-2025-50106

Package Information:
  https://launchpad.net/ubuntu/+source/openjdk-21/21.0.8+9~us1-0ubuntu1~25.04.1
  https://launchpad.net/ubuntu/+source/openjdk-21/21.0.8+9~us1-0ubuntu1~24.04.1
  https://launchpad.net/ubuntu/+source/openjdk-21/21.0.8+9~us1-0ubuntu1~22.04.1