CVE-2023-5676

JVM hang or crash via shutdown race

Published Nov 15, 2023 · Updated Nov 3, 2025

Denial of service in Eclipse OpenJ9 before 0.41.0 allows local users to hang or crash the JVM by signaling it during initialization. The shutdown signal handler can enter protectedDestroyJavaVM or exitJavaVM while J9_CreateJavaVM is still running, racing initialization and exit on shared state. Exploitation requires privileged local access, a SIGTERM, SIGINT, or SIGHUP during the narrow startup window, and results only in a busy hang or segmentation-fault service interruption.

CVSS severity4.1
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Eclipse OpenJ9 before 0.41.0 allows local users to hang or crash the JVM by signaling it during initialization. The shutdown signal handler can enter protectedDestroyJavaVM or exitJavaVM while J9_CreateJavaVM is still running, racing initialization and exit on shared state. Exploitation requires privileged local access, a SIGTERM, SIGINT, or SIGHUP during the narrow startup window, and results only in a busy hang or segmentation-fault service interruption.

The record

CVE
CVE-2023-5676
Published
Nov 15, 2023
Updated
Nov 3, 2025
Vendor
The Eclipse Foundation
Product
Eclipse OpenJ9
Classifications
CWE-362, CWE-364, T1489
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Nov 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.41.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Eclipse Foundation · Eclipse OpenJ9version=0 <0.41.0

Published CVSS scores

4.1Eclipse FoundationCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
5.9NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-364Signal Handler Race Condition
T1489Service Stop

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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