Ubuntu alert USN-7996-1 (openjdk-25-crac)

From:
             
 
noreply+usn-bot@canonical.com
To:
             
 
ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-7996-1] CRaC JDK 25 vulnerabilities
Date:
             
 
Tue, 03 Feb 2026 12:14:33 +0000
Message-ID:
             
 
<E1vnFIf-0007YU-0D@lists.ubuntu.com>
==========================================================================
Ubuntu Security Notice USN-7996-1
February 02, 2026

openjdk-25-crac vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10

Summary:

Several security issues were fixed in CRaC JDK 25.

Software Description:
- openjdk-25-crac: Open Source Java implementation with Coordinated Restore at Checkpoints

Details:

It was discovered that the RMI component of CRaC JDK 25 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 CRaC JDK 25
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 CRaC JDK 25
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 CRaC JDK
25 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-...

Update instructions:

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

Ubuntu 25.10
  openjdk-25-crac-jdk             25.0.2+10-0ubuntu1~25.10
  openjdk-25-crac-jdk-headless    25.0.2+10-0ubuntu1~25.10
  openjdk-25-crac-jre             25.0.2+10-0ubuntu1~25.10
  openjdk-25-crac-jre-headless    25.0.2+10-0ubuntu1~25.10
  openjdk-25-crac-jre-zero        25.0.2+10-0ubuntu1~25.10

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-7996-1
  CVE-2026-21925, CVE-2026-21932, CVE-2026-21933, CVE-2026-21945

Package Information:
  https://launchpad.net/ubuntu/+source/openjdk-25-crac/25.0...


Attachment: signature.asc (type=application/pgp-signature)
-----BEGIN PGP SIGNATURE-----
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=7eEh
-----END PGP SIGNATURE-----