Oracle Database Server up to 19.29/21.20 Java VM denial of service

Summaryinfo

A vulnerability was found in Oracle Database Server up to 19.29/21.20. It has been classified as critical. This affects an unknown function of the component Java VM Component. The manipulation leads to privilege escalation. This vulnerability is listed as CVE-2026-21975. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Oracle Database Server up to 19.29/21.20. It has been rated as critical. This issue affects an unknown code block of the component Java VM Component. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Vulnerability in the Java VM component of Oracle Database Server. Supported versions that are affected are 19.3-19.29 and 21.3-21.20. Easily exploitable vulnerability allows high privileged attacker having Authenticated User privilege with network access via Oracle Net to compromise Java VM. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Java VM. CVSS 3.1 Base Score 4.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H).

The advisory is shared at oracle.com. The identification of this vulnerability is CVE-2026-21975 since 01/05/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are necessary for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-3537). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Database Software

Vendor

• Oracle

Name

• Database Server

Version

• 19.0
• 19.1
• 19.2
• 19.3
• 19.4
• 19.5
• 19.6
• 19.7
• 19.8
• 19.9
• 19.10
• 19.11
• 19.12
• 19.13
• 19.14
• 19.15
• 19.16
• 19.17
• 19.18
• 19.19
• 19.20
• 19.21
• 19.22
• 19.23
• 19.24
• 19.25
• 19.26
• 19.27
• 19.28
• 19.29
• 21.0
• 21.1
• 21.2
• 21.3
• 21.4
• 21.5
• 21.6
• 21.7
• 21.8
• 21.9
• 21.10
• 21.11
• 21.12
• 21.13
• 21.14
• 21.15
• 21.16
• 21.17
• 21.18
• 21.19
• 21.20

License

• commercial

Website

• Vendor: https://www.oracle.com

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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