CVE-2026-47041 Overview
CVE-2026-47041 is a denial of service vulnerability in the Core component of Oracle VM VirtualBox. The affected supported version is 7.2.12. An attacker with high privileges and local logon access to the infrastructure where Oracle VM VirtualBox executes can compromise the hypervisor. Successful exploitation results in a hang or repeatable crash, producing a complete denial of service condition. The vulnerability carries a scope change, meaning attacks against VirtualBox may impact additional products running on the host. The weakness is categorized under [CWE-400] Uncontrolled Resource Consumption.
Critical Impact
A local, high-privileged attacker can trigger a complete denial of service in Oracle VM VirtualBox, with scope change affecting adjacent products on the host infrastructure.
Affected Products
- Oracle VM VirtualBox 7.2.12
- Oracle Virtualization product family
- Core component of Oracle VM VirtualBox
Discovery Timeline
- 2026-07-21 - CVE-2026-47041 published to NVD
- 2026-07-21 - Oracle Critical Patch Update (July 2026) released addressing the issue
- 2026-07-23 - CVE-2026-47041 last updated in NVD database
Technical Details for CVE-2026-47041
Vulnerability Analysis
The vulnerability resides in the Core component of Oracle VM VirtualBox, the hypervisor engine responsible for managing virtual machine state, device emulation, and host-guest interactions. An attacker who is already authenticated to the host with high privileges can trigger conditions that cause the hypervisor process to hang or crash reliably. Because the flaw exhibits a scope change, the impact is not confined to the VirtualBox process. Adjacent workloads and services running on the same host infrastructure can be disrupted when the hypervisor fails. The availability impact is high, while confidentiality and integrity are not affected. The attack complexity is low and requires no user interaction, making exploitation reliable once the attacker holds local access.
Root Cause
The root cause is uncontrolled resource consumption within the VirtualBox Core component, consistent with [CWE-400]. Specific technical details have not been published by Oracle. The Oracle Critical Patch Update advisory attributes the flaw to conditions in the Core module that permit a privileged local actor to exhaust or corrupt hypervisor resources, producing a hang or repeatable crash.
Attack Vector
Exploitation requires local access to the infrastructure where Oracle VM VirtualBox executes. The attacker must hold high privileges on the host, such as an administrator account or a role with hypervisor management rights. No user interaction is required. Once the attacker triggers the vulnerable code path in the Core component, VirtualBox hangs or crashes, and the scope change extends the availability impact to other products sharing the host.
No public proof-of-concept exploit is available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS probability is approximately 0.113%, indicating a low likelihood of exploitation activity in the near term. Refer to the Oracle Security Alert July 2026 for the authoritative technical description.
Detection Methods for CVE-2026-47041
Indicators of Compromise
- Unexpected termination or hang of VBoxHeadless, VBoxSVC, or VirtualBox processes on the host.
- Sudden loss of guest VM availability without corresponding scheduled maintenance events.
- Host-level crash dumps or event log entries referencing the VirtualBox Core component.
Detection Strategies
- Monitor VirtualBox process health and restart frequency on hosts running version 7.2.12.
- Correlate hypervisor process crashes with recent local authentication events from privileged accounts.
- Review host audit logs for anomalous administrative activity preceding VirtualBox instability.
Monitoring Recommendations
- Enable centralized logging of VirtualBox service events and forward them to a SIEM or data lake for correlation.
- Alert on repeated crashes or hangs of hypervisor processes within short time windows.
- Track privileged local logon sessions on hosts running VirtualBox and baseline expected administrative behavior.
How to Mitigate CVE-2026-47041
Immediate Actions Required
- Apply the fixes delivered in the Oracle Critical Patch Update July 2026 to all hosts running Oracle VM VirtualBox 7.2.12.
- Inventory all systems running Oracle VM VirtualBox and confirm version status before and after patching.
- Restrict high-privilege local accounts on VirtualBox hosts to reduce the population of users capable of triggering the flaw.
Patch Information
Oracle addressed CVE-2026-47041 in the July 2026 Critical Patch Update. Administrators should upgrade Oracle VM VirtualBox beyond version 7.2.12 to the fixed release documented in the Oracle Security Alert July 2026. Reboot or restart the VirtualBox services after applying the update to ensure the fixed binaries are loaded.
Workarounds
- Limit local administrative access to VirtualBox hosts using role-based access control and just-in-time privilege elevation.
- Isolate critical workloads from shared VirtualBox hosts to reduce the blast radius of a scope-change availability event.
- Enforce multi-factor authentication for privileged accounts that can log on to virtualization hosts.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
