CVE-2026-111075: CWE-191 in Eclipse Foundation Eclipse OpenJ9
Description
Eclipse OpenJ9 versions prior to 0.63.0 contain a vulnerability in the JITServer component where attacker-controlled fields are not properly validated during DataDescriptor message deserialization. This allows an unauthenticated remote attacker to cause an unsigned integer underflow, leading to out-of-bounds heap reads and an immediate process crash (SIGSEGV), resulting in denial of service.
CVSS v4.0
Score 8.7high
Affected software
Eclipse Foundation
Eclipse OpenJ9
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In Eclipse OpenJ9 versions before 0.63.0, the JITServer component does not perform adequate cross-field validation on the _size, _paddingSize, and _dataOffset fields during deserialization of DataDescriptor messages. An unauthenticated remote attacker can send crafted network payloads that trigger an unsigned integer underflow in the methods DataDescriptor::getPayloadSize() and DataDescriptor::getNextDescriptor(). This vulnerability causes out-of-bounds heap reads and immediate process crashes (SIGSEGV), leading to denial of service conditions.
Potential Impact
An unauthenticated remote attacker can exploit this vulnerability to cause the affected process to crash immediately, resulting in denial of service. There is no indication of code execution or data disclosure from the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- eclipse
- Date Reserved
- 2026-10-15T13:55:41.439Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad871fc2cdf04f656cd8120
Added to database: 10/21/2026, 08:04:12 UTC
Last enriched: 10/21/2026, 08:18:13 UTC
Last updated: 10/21/2026, 13:40:20 UTC
Views: 13
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