CVE-2026-111074

In Eclipse OpenJ9 versions prior to 0.63.0, the JITServer component is vulnerable to a pre-authentication remote denial of service. When processing the initial 4-byte length field of an incoming TCP connection, an integer overflow in `MessageBuffer::computeRequiredCapacity()` causes the receiving compilation worker thread to enter an infinite loop consuming ~100% CPU. An unauthenticated remote attacker can exploit this by opening a small number of crafted TCP connections to exhaust the entire worker thread pool, silently halting compilation services for all connected client JVMs.

Score

CVSS 4.0 8.7 High

Status

Awaiting Analysis - emo@eclipse.org

Published

2026-10-21

Last modified

2026-10-26

Weaknesses

CWE-190, CWE-835

Affected products

• Eclipse Openj9 (Eclipse Foundation)

References

• https://github.com/eclipse-openj9/openj9/pull/25008
• https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/940
• https://gitlab.eclipse.org/security/cve-assignment/-/work_items/422