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CVE-2026-111075

Eclipse OpenJ9: JITServer: Pre-authentication remote crash via integer underflow and out-of-bounds heap read in DataDescriptor deserialization

Eclipse Foundation Eclipse OpenJ9
Open in ThreatlineRecord JSON
CVSS
8.7High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.37%Chance of exploitation activity in the next 30 days, higher than 29% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in0.63Fixed versionCVE List
Published21 Oct 2026Updated 21 Oct 2026CVE List

What fixes it

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 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.

Text from CVE List

Affected versions 1

  • Eclipse OpenJ9affected: 0.8.0 before 0.63CVE List

References 3