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[USN-8001-1] OpenJDK 11 vulnerabilities

Posted on 03 February 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8001-1
February 02, 2026

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

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in OpenJDK 11.

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

Details:

It was discovered that the RMI component of OpenJDK 11 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 11
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 11
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 component of OpenJDK 11
failed to verify provided URIs point to a legitimate source when
AIA is enabled. An unauthenticated remote attacker could possibly
use this issue to redirect users to malicious hosts.
(CVE-2026-21945)

In addition to security fixes, the updated packages contain bug fixes,
new features, and possibly incompatible changes.

Please see the following for more information:
https://openjdk.org/groups/vulnerability/advisories/2026-01-20

Update instructions:

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

Ubuntu 25.10
openjdk-11-jdk 11.0.30+7-1ubuntu1~25.10
openjdk-11-jdk-headless 11.0.30+7-1ubuntu1~25.10
openjdk-11-jre 11.0.30+7-1ubuntu1~25.10
openjdk-11-jre-headless 11.0.30+7-1ubuntu1~25.10
openjdk-11-jre-zero 11.0.30+7-1ubuntu1~25.10

Ubuntu 24.04 LTS
openjdk-11-jdk 11.0.30+7-1ubuntu1~24.04
openjdk-11-jdk-headless 11.0.30+7-1ubuntu1~24.04
openjdk-11-jre 11.0.30+7-1ubuntu1~24.04
openjdk-11-jre-headless 11.0.30+7-1ubuntu1~24.04
openjdk-11-jre-zero 11.0.30+7-1ubuntu1~24.04

Ubuntu 22.04 LTS
openjdk-11-jdk 11.0.30+7-1ubuntu1~22.04
openjdk-11-jdk-headless 11.0.30+7-1ubuntu1~22.04
openjdk-11-jre 11.0.30+7-1ubuntu1~22.04
openjdk-11-jre-headless 11.0.30+7-1ubuntu1~22.04
openjdk-11-jre-zero 11.0.30+7-1ubuntu1~22.04

Ubuntu 20.04 LTS
openjdk-11-jdk 11.0.30+7-1ubuntu1~20.04
Available with Ubuntu Pro
openjdk-11-jdk-headless 11.0.30+7-1ubuntu1~20.04
Available with Ubuntu Pro
openjdk-11-jre 11.0.30+7-1ubuntu1~20.04
Available with Ubuntu Pro
openjdk-11-jre-headless 11.0.30+7-1ubuntu1~20.04
Available with Ubuntu Pro
openjdk-11-jre-zero 11.0.30+7-1ubuntu1~20.04
Available with Ubuntu Pro

Ubuntu 18.04 LTS
openjdk-11-jdk 11.0.30+7-1ubuntu1~18.04
Available with Ubuntu Pro
openjdk-11-jdk-headless 11.0.30+7-1ubuntu1~18.04
Available with Ubuntu Pro
openjdk-11-jre 11.0.30+7-1ubuntu1~18.04
Available with Ubuntu Pro
openjdk-11-jre-headless 11.0.30+7-1ubuntu1~18.04
Available with Ubuntu Pro
openjdk-11-jre-zero 11.0.30+7-1ubuntu1~18.04
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-8001-1
CVE-2026-21925, CVE-2026-21932, CVE-2026-21933, CVE-2026-21945

Package Information:
https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.30+7-1ubuntu1~25.10
https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.30+7-1ubuntu1~24.04
https://launchpad.net/ubuntu/+source/openjdk-lts/11.0.30+7-1ubuntu1~22.04

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