CVE-2021-2438Network attack vector

Authenticated Java VM service interruption

Published Jul 20, 2021 · Updated Sep 25, 2024

Denial of service in Oracle Database 12.1.0.2, 12.2.0.1, and 19c allows remote authenticated users to interrupt the Java VM. Oracle identifies the affected component only as Java VM and has not disclosed the code-level operation that mishandles attacker-controlled input. Exploitation requires Oracle Net access and a low-privileged database account with Create Procedure privilege; the reported consequence is partial Java VM service interruption.

CVSS severity4.3
Medium
EPSS probability0.84%
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 Oracle Database 12.1.0.2, 12.2.0.1, and 19c allows remote authenticated users to interrupt the Java VM. Oracle identifies the affected component only as Java VM and has not disclosed the code-level operation that mishandles attacker-controlled input. Exploitation requires Oracle Net access and a low-privileged database account with Create Procedure privilege; the reported consequence is partial Java VM service interruption.

The record

CVE
CVE-2021-2438
Published
Jul 20, 2021
Updated
Sep 25, 2024
Vendor
Oracle Corporation
Product
Oracle Database
Classifications
T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=12.1.0.2
  2. Affected versionversion=12.2.0.1
  3. Affected versionversion=19c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Oracle Corporation · Oracle Databaseversion=12.1.0.2; version=12.2.0.1; version=19c

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:N/I:N/A:P
4.3Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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