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Back to active CVEs
High · CVSS 8.7CVE-2026-111075

JITServer: Pre-authentication remote crash via integer underflow and out-of-bounds heap read in DataDescriptor deserializationCVE-2026-111075

Answer in brief

CVE-2026-111075 records a High severity (CVSS 8.7) vulnerability in JITServer: Pre-authentication remote crash via integer underflow and out-of-bounds heap read in DataDescriptor deserialization. The current sources do not mark it as known exploited. The current feed maps Eclipse Foundation/Eclipse OpenJ9 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 21, 2026Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Eclipse Foundation/Eclipse OpenJ9 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Eclipse Foundation/Eclipse OpenJ9generic>=0.8.0 <0.630.63

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Eclipse Foundation/Eclipse OpenJ9.
  2. 2Review the reported fix. Update Eclipse Foundation/Eclipse OpenJ9 to 0.63 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 21, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencegitlab.eclipse.org
  • Source referencegitlab.eclipse.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • JITServer: Multiple Denial of Service vulnerabilities via out-of-bounds heap reads during message and reply parsingSame eclipse foundation/eclipse openj9 package
  • JITServer: Pre-authentication remote Denial of Service via integer overflow infinite loop in MessageBuffer::computeRequiredCapacity()Same eclipse foundation/eclipse openj9 package

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-191, CWE-125
Source
CVE List V5
Source checked
Oct 21, 2026
References
3 linked sources
Open source record