In Eclipse OpenJ9 versions up to 0.63.0, the JITServer component is vulnerable to denial of service due to improper boundary checks during protocol message and reply handling. An unauthenticated remote attacker or malicious JITServer can transmit malformed network payloads that cause out-of-bounds heap reads, immediately crashing the JITServer daemon or client JVM process via a segmentation fault (SIGSEGV).

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Eclipse Foundation Eclipse OpenJ9 unaffected
Version Status Constraints
0.8.0 affected < 0.63

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/eclipse-openj9/openj9/pull/25011 cve-icon cve-icon
https://gitlab.eclipse.org/security/cve-assignment/-/work_items/407 cve-icon cve-icon
https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/943 cve-icon cve-icon
https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/944 cve-icon cve-icon
https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/946 cve-icon cve-icon
https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/947 cve-icon cve-icon
History

Wed, 21 Oct 2026 08:30:00 +0000

Type Values Removed Values Added
Description In Eclipse OpenJ9 versions up to 0.63.0, the JITServer component is vulnerable to denial of service due to improper boundary checks during protocol message and reply handling. An unauthenticated remote attacker or malicious JITServer can transmit malformed network payloads that cause out-of-bounds heap reads, immediately crashing the JITServer daemon or client JVM process via a segmentation fault (SIGSEGV).
Title JITServer: Multiple Denial of Service vulnerabilities via out-of-bounds heap reads during message and reply parsing
Weaknesses CWE-125
CWE-20
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: eclipse

Published:

Updated: 2026-10-21T08:03:26.062Z

Reserved: 2026-10-15T07:11:06.825Z

Link: CVE-2026-110938

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-21T09:17:06.717

Modified: 2026-10-21T09:17:06.717

Link: CVE-2026-110938

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses