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.
History

Mon, 26 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 21 Oct 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Eclipse
Eclipse eclipse Openj9
Vendors & Products Eclipse
Eclipse eclipse Openj9

Wed, 21 Oct 2026 08:15:00 +0000

Type Values Removed Values Added
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.
Title JITServer: Pre-authentication remote crash via integer underflow and out-of-bounds heap read in DataDescriptor deserialization
Weaknesses CWE-125
CWE-191
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: eclipse

Published: 2026-10-21T08:00:32.804Z

Updated: 2026-10-26T17:57:34.946Z

Reserved: 2026-10-15T13:55:41.439Z

Link: CVE-2026-111075

cve-icon Vulnrichment

Updated: 2026-10-26T17:50:39.662Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-21T08:16:42.960

Modified: 2026-10-26T18:17:35.790

Link: CVE-2026-111075

cve-icon Redhat

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