CVE-2023-21899

VM hang or repeated crash via undisclosed flaw

Published Jan 17, 2023 · Updated Feb 13, 2025

Denial of service in Oracle VM VirtualBox before 6.1.42 and 7.0.6 allows local users to hang or repeatedly crash Windows guest VMs. Oracle identifies the affected component only as Core and has not published the operation or input that triggers the failure. Low-privileged host logon is required, and the flaw applies only to virtual machines running Windows 7 or later; the bounded consequence is a VM hang or frequently repeatable crash.

CVSS severity5.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in Oracle VM VirtualBox before 6.1.42 and 7.0.6 allows local users to hang or repeatedly crash Windows guest VMs. Oracle identifies the affected component only as Core and has not published the operation or input that triggers the failure. Low-privileged host logon is required, and the flaw applies only to virtual machines running Windows 7 or later; the bounded consequence is a VM hang or frequently repeatable crash.

The record

CVE
CVE-2023-21899
Published
Jan 17, 2023
Updated
Feb 13, 2025
Vendor
Oracle Corporation
Product
Oracle VM VirtualBox
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=* <6.1.42
  2. Affected versionversion=* <7.0.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Oracle Corporation · Oracle VM VirtualBoxversion=* <6.1.42; version=* <7.0.6

Published CVSS scores

5.5Oracle CorporationCVSS:3.1/AV:L/AC:L/PR:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo