CVE-2026-111074
Eclipse OpenJ9: JITServer: Pre-authentication remote Denial of Service via integer overflow infinite loop in MessageBuffer::computeRequiredCapacity()
Eclipse Foundation Eclipse OpenJ9
CVSS
8.7HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.42%Chance of exploitation activity in the next 30 days, higher than 35% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 0.63Eclipse OpenJ9CVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
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.
Text from CVE List
Affected versions 1
- Eclipse OpenJ9affected: 0.8.0 before 0.63CVE List