OpenJDK-21-crac refers to the CRaC (Coordinated Restore at Checkpoint) enabled OpenJDK 21 runtime, a Java platform feature designed for coordinated checkpoint/restore to accelerate startup and scaling in cloud/container environments.
Openjdk-21-crac 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 refers to the CRaC (Coordinated Restore at Checkpoint) enabled OpenJDK 21 runtime, a Java platform feature designed for coordinated checkpoint/restore to accelerate startup and scaling in cloud/container environments. Its cybersecurity relevance lies in the potential attack surface within the CRaC mechanism, making timely patching essential when vulnerabilities are disclosed (as indicated by the CVE-2025 advisory in the Ubuntu USN-7901-1 notice).
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 refers to the CRaC (Coordinated Restore at Checkpoint) enabled OpenJDK 21 runtime, a Java platform feature designed for coordinated checkpoint/restore to accelerate startup and scaling in cloud/container environments.
The most recent intelligence report mentioning Openjdk-21-crac on ThreatCluster is dated December 2, 2025.
Across ThreatCluster reporting, Openjdk-21-crac most frequently co-occurs with Zero-day Exploit, CVE-2025-53057, CVE-2025-53066, CVE-2025-61748, Openjdk-21-crac-jdk, 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 appears across 2 threat clusters in total, listed above with sources.
Openjdk-21-crac appears in 1 intelligence report mention across 2 deduplicated threat clusters, aggregated from 17,000+ monitored sources.