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TI-2026-78629 Aliases CVE-2026-111075GHSA-9wq7-cgfv-cwx8

Integer underflow in Eclipse OpenJ9 JITServer crashes process

Priority MEDIUM 44CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

Eclipse OpenJ9 versions from 0.8.0 before 0.63.0 have a flaw in the JITServer component, which fails to validate the size, padding size and data offset fields of DataDescriptor messages. An unauthenticated remote attacker can send a crafted network payload that causes an unsigned integer underflow, leading to an out-of-bounds heap read. The process crashes immediately with SIGSEGV, causing a denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00372 31st percentileScored 2026-11-07
Fix Fixed Eclipse OpenJ9 (Eclipse Foundation): 0.63

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Eclipse FoundationEclipse OpenJ90.8.0 to before 0.630.63Patch availableCNA
  • Eclipse OpenJ9 VendorEclipse Foundation Affected 0.8.0 to before 0.63 Fixed in 0.63 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:eclipse:openj9:*:*:*:*:*:*:*:*——Eclipse Foundation

Remediation

Upgrade Eclipse OpenJ9 to version 0.63.0 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Eclipse OpenJ9 (Eclipse Foundation) Fixed in 0.63

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Eclipse OpenJ9 0.63

    3 records Highest priority Priority MEDIUM 3 MEDIUM

    Other records, highest priority first

    • TI-2026-78628 Integer overflow in Eclipse OpenJ9 JITServer enables remote DoSPriority MEDIUM 44
    • TI-2026-78626 Out-of-bounds heap reads in Eclipse OpenJ9 JITServer enable denial of servicePriority MEDIUM 44
    Show all 3 records →

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-111075
  2. 2026-10-21 Alias added: GHSA-9wq7-cgfv-cwx8
  3. 2026-10-22 Priority changed: MEDIUM → LOW
  4. 2026-10-26 CISA SSVC decision points changed
  5. 2026-10-26 Priority changed: LOW → MEDIUM

References

Other 3

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2026-81947 Unauthenticated command injection in Eclipse Che che-machine-exec CVSS 3.1CRITICAL 9.8
  • TI-2026-13216 CWE-863: ABAC authorization bypass via trailing slash route normalization in Eclipse BaSyx Go Components CVSS 3.1CRITICAL 9.8
  • TI-2026-06514 Path traversal in Eclipse BaSyx CVSS 3.1CRITICAL 10.0
  • TI-2026-01382 In the Eclipse Theia Website repository, the GitHub Actions workflow… CVSS 3.1CRITICAL 10.0
  • TI-2026-74697 Authentication bypass in Eclipse Jetty EthereumAuthenticator CVSS 4.0CRITICAL 9.3
See all 466 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences