Home / mailings

PDF

[USN-7901-1] CRaC JDK 21 vulnerabilities

Posted on 02 December 2025
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-7901-1
December 01, 2025

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

- Ubuntu 25.10
- Ubuntu 25.04

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:

Jinfeng Guo discovered that the Security component of CRaC JDK 21 did not
correctly handle certain representations of encoded strings. An
unauthenticated remote attacker could possibly use this issue to modify
files or leak sensitive information. (CVE-2025-53057)

Darius Bohni discovered that the JAXP component of CRaC JDK 21 was
vulnerable to a XML External Entity (XEE) attack. An unauthenticated remote
attacker could possibly use this issue to modify files or leak sensitive
information. (CVE-2025-53066)

Yakov Shafranovich discovered that the Libraries component of CRaC JDK 21
contained an issue where certain Strings built with StringBuilder returned
an incorrect result for String.equals() checks. An unauthenticated remote
attacker could possibly use this issue to update, insert, or delete
accessible data. (CVE-2025-61748)

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/2025-10-21

Update instructions:

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

Ubuntu 25.10
openjdk-21-crac-jdk 21.0.9+10-0ubuntu1~25.10
openjdk-21-crac-jdk-headless 21.0.9+10-0ubuntu1~25.10
openjdk-21-crac-jre 21.0.9+10-0ubuntu1~25.10
openjdk-21-crac-jre-headless 21.0.9+10-0ubuntu1~25.10
openjdk-21-crac-jre-zero 21.0.9+10-0ubuntu1~25.10

Ubuntu 25.04
openjdk-21-crac-jdk 21.0.9+10-0ubuntu1~25.04
openjdk-21-crac-jdk-headless 21.0.9+10-0ubuntu1~25.04
openjdk-21-crac-jre 21.0.9+10-0ubuntu1~25.04
openjdk-21-crac-jre-headless 21.0.9+10-0ubuntu1~25.04
openjdk-21-crac-jre-zero 21.0.9+10-0ubuntu1~25.04

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-7901-1
CVE-2025-53057, CVE-2025-53066, CVE-2025-61748

Package Information:
https://launchpad.net/ubuntu/+source/openjdk-21-crac/21.0.9+10-0ubuntu1~25.10
https://launchpad.net/ubuntu/+source/openjdk-21-crac/21.0.9+10-0ubuntu1~25.04

--===============8190028873347772307==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

TOP