CVE-2026-111075

In Eclipse OpenJ9 versions prior to 0.63.0, the JITServer component fails to perform cross-field validation on attacker-controlled `_size`, `_paddingSize`, and `_dataOffset` fields during `DataDescriptor` message deserialization. An unauthenticated remote attacker can send a crafted network payload that triggers an unsigned integer underflow in `DataDescriptor::getPayloadSize()` and `DataDescriptor::getNextDescriptor()`. This results in an out-of-bounds heap read and an immediate process crash (SIGSEGV), causing a denial of service.

Score

CVSS 4.0 8.7 High

Status

Awaiting Analysis - emo@eclipse.org

Published

2026-10-21

Last modified

2026-10-26

Weaknesses

CWE-125, CWE-191

Affected products

• Eclipse Openj9 (Eclipse Foundation)

References

• https://github.com/eclipse-openj9/openj9/pull/25009
• https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/941
• https://gitlab.eclipse.org/security/cve-assignment/-/work_items/423