Ubuntu fixes OpenJDK 27 flaws that can expose data
USN-9005-1 covers remote authentication failures in 2D and Networking, including CVE-2026-91415 and CVE-2026-83395.
Input validation flaw in Oracle Java SE 2D component
Improper input handling in the 2D component of Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition lets an unauthenticated remote attacker, via multiple protocols, crash or hang the runtime and read or change some accessible data. Exploitation is difficult and uses 2D APIs, for example a web service that supplies data to them. It also applies to sandboxed Java Web Start apps and applets that run untrusted code.
What to do: Apply Oracle's update for CVE-2026-91415. Oracle has not listed fixed versions.
| Product | Affected |
|---|---|
| Oracle Java SE | 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27 |
| Oracle GraalVM for JDK | 17.0.20.1 and 21.0.12.1 |
| Oracle GraalVM Enterprise Edition | 21.3.19.1.1 |
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: 2D). Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27; Oracle GraalVM for JDK: 17.0.20.1 and 21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition as well as unauthorized update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data and unauthorized read access to a subset of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also 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. CVSS 3.1 Base Score 7.0 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H).
USN-9005-1 covers remote authentication failures in 2D and Networking, including CVE-2026-91415 and CVE-2026-83395.
USN-9004-1 lists remote flaws in 2D, Networking and JGSS, including CVE-2026-91382.
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