OpenJDK-21-CRAC-JRE-ZERO is the CRaC-enabled variant of OpenJDK 21 packaged as openjdk-21-crac-jre-zero, a Java Runtime Environment that supports Coordinated Restore at Checkpoint for potential fast startup and state restoration.
Openjdk-21-crac-jre-zero is a technology platform tracked across 2 threat clusters and 1 intelligence report mention on ThreatCluster. First observed December 2, 2025; most recent activity December 2, 2025.
OpenJDK-21-CRAC-JRE-ZERO is the CRaC-enabled variant of OpenJDK 21 packaged as openjdk-21-crac-jre-zero, a Java Runtime Environment that supports Coordinated Restore at Checkpoint for potential fast startup and state restoration. It is a Java platform component used in Ubuntu environments, with cybersecurity significance due to its exposure to security advisories tied to OpenJDK 21. The recent USN-7901-1 advisory (CVE-2025) highlights the importance of applying patches to mitigate vulnerabilities in this runtime.
Several critical security vulnerabilities were identified in various versions of OpenJDK, affecting Ubuntu 25.10 and its derivatives. The issues include improper handling of encoded strings and XML External Entity (XEE)…
OpenJDK versions 21 and 25 have been found to contain vulnerabilities that allow unauthenticated remote attackers to potentially modify files or leak sensitive information. The issues were discovered in the Security…
OpenJDK-21-CRAC-JRE-ZERO is the CRaC-enabled variant of OpenJDK 21 packaged as openjdk-21-crac-jre-zero, a Java Runtime Environment that supports Coordinated Restore at Checkpoint for potential fast startup and state restoration.
The most recent intelligence report mentioning Openjdk-21-crac-jre-zero on ThreatCluster is dated December 2, 2025.
Across ThreatCluster reporting, Openjdk-21-crac-jre-zero most frequently co-occurs with Zero-day Exploit, CVE-2025-53057, CVE-2025-53066, CVE-2025-61748, Openjdk-21-crac, among 12 tracked related entities.
The most significant recent cluster is “Multiple OpenJDK Vulnerabilities Discovered in Ubuntu 25.10 and Derivatives” (11 articles · Updated December 2, 2025). Openjdk-21-crac-jre-zero appears across 2 threat clusters in total, listed above with sources.
Openjdk-21-crac-jre-zero appears in 1 intelligence report mention across 2 deduplicated threat clusters, aggregated from 17,000+ monitored sources.