High severity · published Oct 21, 2026
CVE-2026-111075
JITServer: Pre-authentication remote crash via integer underflow and out-of-bounds heap read in DataDescriptor deserialization
8.7
CVSS
0.4%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EO
Eclipse OpenJ9 · Eclipse Foundation
0.8.0 before 0.63 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111075
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111075
github.com
https://github.com/eclipse-openj9/openj9/pull/25009
gitlab.eclipse.org
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/423
gitlab.eclipse.org
https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/941
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