CVE-2026-111075
High
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.
SeverityHigh
CVSS8.7
Exploit probability—
ProductEclipse OpenJ9
PublishedOct 21, 2026
First seenOct 21, 2026
Weakness typeCWE-191CWE-191CWE-125Out-of-bounds read
How to fix
Update
- Eclipse Foundation Eclipse OpenJ90.63 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Eclipse Foundation Eclipse OpenJ9 | 0.8.0 ≤ v < 0.63 | 0.63 |
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