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[USN-8341-1] OpenJDK 26 vulnerabilities

Posted on 28 May 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8341-1
May 28, 2026

openjdk-26 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 25.10

Summary:

Several security issues were fixed in OpenJDK 26.

Software Description:
- openjdk-26: Open Source Java implementation

Details:

Thomas Beckers discovered that the JAXP component of OpenJDK 26 did not
correctly authenticate certain APIs. A remote unauthenticated attacker
could possibly use this issue to gain unauthorized access to sensitive
information. (CVE-2026-22016)

It was discovered that the Networking component of OpenJDK 26 did not
correctly authenticate certain APIs. A remote unauthenticated attacker
could possibly use this issue to cause a denial of service.
(CVE-2026-34282)

It was discovered that the JSSE component of OpenJDK 26 did not correctly
authenticate certain APIs. A remote unauthenticated attacker could
possibly use this issue to cause a denial of service. (CVE-2026-22021)

It was discovered that the JGSS component of OpenJDK 26 did not correctly
authenticate certain APIs. A remote attacker could possibly use this issue
to obtain sensitive information. (CVE-2026-22013)

It was discovered that the 2D component of OpenJDK 26 did not correctly
handle certain integer arithmetic. If a user or automated system were
tricked into opening a specially crafted file, an attacker could
possibly use this issue to obtain sensitive information. (CVE-2026-23865)

It was discovered that the Libraries component of OpenJDK 26 did not
correctly authenticate certain APIs. A remote unauthenticated attacker
could possibly use this issue to modify data. (CVE-2026-22008)

It was discovered that the Libraries component of OpenJDK 26 did not
correctly authenticate certain APIs. A remote unauthenticated attacker
could possibly use this issue to cause a denial of service.
(CVE-2026-22018)

Ken Pyle discovered that the Security component of OpenJDK 26 did not
correctly authenticate certain APIs. A local attacker could possibly
use this issue to obtain sensitive information.
(CVE-2026-22007, CVE-2026-34268)

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/2026-04-21

Update instructions:

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

Ubuntu 26.04 LTS
openjdk-26-jdk 26.0.1+8-2~26.04.2
openjdk-26-jdk-headless 26.0.1+8-2~26.04.2
openjdk-26-jre 26.0.1+8-2~26.04.2
openjdk-26-jre-headless 26.0.1+8-2~26.04.2
openjdk-26-jre-zero 26.0.1+8-2~26.04.2

Ubuntu 25.10
openjdk-26-jdk 26.0.1+8-2~25.10.2
openjdk-26-jdk-headless 26.0.1+8-2~25.10.2
openjdk-26-jre 26.0.1+8-2~25.10.2
openjdk-26-jre-headless 26.0.1+8-2~25.10.2
openjdk-26-jre-zero 26.0.1+8-2~25.10.2

This update uses a new upstream release, which includes additional bug
fixes. 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-8341-1
CVE-2026-22007, CVE-2026-22008, CVE-2026-22013, CVE-2026-22016,
CVE-2026-22018, CVE-2026-22021, CVE-2026-23865, CVE-2026-34268,
CVE-2026-34282

Package Information:
https://launchpad.net/ubuntu/+source/openjdk-26/26.0.1+8-2~26.04.2
https://launchpad.net/ubuntu/+source/openjdk-26/26.0.1+8-2~25.10.2

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