Ubuntu alert USN-8333-1 (openjdk-21-crac)

From:
             
 
noreply+usn-bot@canonical.com
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-8333-1] CRaC JDK 21 vulnerabilities
Date:
             
 
Thu, 28 May 2026 16:50:24 +0000
Message-ID:
             
 
<E1wSdw8-0000mQ-Dm@lists.ubuntu.com>
==========================================================================
Ubuntu Security Notice USN-8333-1
May 28, 2026

openjdk-21-crac 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 CRaC JDK 21.

Software Description:
- openjdk-21-crac: Open Source Java implementation with Coordinated Restore at Checkpoints

Details:

Thomas Beckers discovered that the JAXP component of CRaC JDK 21 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 CRaC JDK 21 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 CRaC JDK 21 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 CRaC JDK 21 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 CRaC JDK 21 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 leak sensitive information. (CVE-2026-23865)

It was discovered that the Libraries component of CRaC JDK 21 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 CRaC JDK 21 did not
correctly authenticate certain APIs. A local attacker could possibly use
this issue to leak 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-...

Update instructions:

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

Ubuntu 26.04 LTS
  openjdk-21-crac-jdk             21.0.11+10-0ubuntu1~26.04.1
  openjdk-21-crac-jdk-headless    21.0.11+10-0ubuntu1~26.04.1
  openjdk-21-crac-jre             21.0.11+10-0ubuntu1~26.04.1
  openjdk-21-crac-jre-headless    21.0.11+10-0ubuntu1~26.04.1
  openjdk-21-crac-jre-zero        21.0.11+10-0ubuntu1~26.04.1

Ubuntu 25.10
  openjdk-21-crac-jdk             21.0.11+10-0ubuntu1~25.10.1
  openjdk-21-crac-jdk-headless    21.0.11+10-0ubuntu1~25.10.1
  openjdk-21-crac-jre             21.0.11+10-0ubuntu1~25.10.1
  openjdk-21-crac-jre-headless    21.0.11+10-0ubuntu1~25.10.1
  openjdk-21-crac-jre-zero        21.0.11+10-0ubuntu1~25.10.1

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-8333-1
  CVE-2026-22007, 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-21-crac/21.0...
  https://launchpad.net/ubuntu/+source/openjdk-21-crac/21.0...


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