CVE-2023-21835: Azul Zulu

Medium severity, CVSS 5.3. EPSS: 1.9% chance of exploitation in the next 30 days.

Vulnerability in the Oracle Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JSSE). Supported versions that are affected are Oracle Java SE: 11.0.17, 17.0.5, 19.0.1; Oracle GraalVM Enterprise Edition: 20.3.8, 21.3.4 and 22.3.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via DTLS to compromise Oracle Java SE, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE, Oracle GraalVM Enterprise Edition. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Affected products

• Azul Zulu: version 11.60 only; version 13.52 only; version 15.44 only; version 17.38 only; version 19.30 only
• Oracle Graalvm: version 20.3.8 only; version 21.3.4 only; version 22.3.0 only
• Oracle JDK: version 11.0.17 only; version 17.0.5 only; version 19.0.1 only
• Oracle JRE: version 11.0.17 only; version 17.0.5 only; version 19.0.1 only

Published 2023-01-18. Last modified 2026-06-17.