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.
Metrics
Affected Vendors & Products
References
History
Mon, 26 Oct 2026 18:30:00 +0000
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ssvc
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Thu, 22 Oct 2026 16:15:00 +0000
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Eclipse
Eclipse eclipse Openj9 |
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| Vendors & Products |
Eclipse
Eclipse eclipse Openj9 |
Wed, 21 Oct 2026 08:15:00 +0000
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| 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. | |
| Title | JITServer: Pre-authentication remote Denial of Service via integer overflow infinite loop in MessageBuffer::computeRequiredCapacity() | |
| Weaknesses | CWE-190 CWE-835 |
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| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: eclipse
Published: 2026-10-21T07:57:16.912Z
Updated: 2026-10-26T17:57:35.098Z
Reserved: 2026-10-15T13:44:42.349Z
Link: CVE-2026-111074
Updated: 2026-10-26T17:50:44.981Z
Status : Awaiting Analysis
Published: 2026-10-21T08:16:42.810
Modified: 2026-10-26T18:17:35.633
Link: CVE-2026-111074
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