Ubuntu 25.10: Crucial Security Fix for OpenJDK 21 USN-7901-1 CVE-2025-53057

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...