CVE-2026-47053 Overview
CVE-2026-47053 affects the Core component of Oracle VM VirtualBox version 7.2.12. The vulnerability allows a low-privileged attacker with local logon access to the infrastructure running VirtualBox to compromise the hypervisor. Exploitation requires human interaction from a user other than the attacker.
Successful attacks enable unauthorized creation, deletion, or modification of critical data accessible to VirtualBox. Attackers can also trigger a partial denial of service against the VirtualBox service. Oracle disclosed the flaw in the July 2026 Critical Patch Update.
Critical Impact
Local, low-privileged attackers can modify or destroy VirtualBox-accessible data and degrade hypervisor availability when a second user performs a required action.
Affected Products
- Oracle VM VirtualBox 7.2.12
- Oracle Virtualization (Core component)
- Deployments running the affected VirtualBox release on any supported host operating system
Discovery Timeline
- 2026-07-21 - CVE-2026-47053 published to NVD
- 2026-07-23 - Last updated in NVD database
Technical Details for CVE-2026-47053
Vulnerability Analysis
The flaw resides in the Core component of Oracle VM VirtualBox, the runtime engine responsible for virtual machine execution and host-guest interactions. The weakness maps to [CWE-285] Improper Authorization, indicating that the Core component performs an action without correctly verifying that the requesting principal is entitled to perform it.
Oracle classifies the issue as easily exploitable. An attacker who already possesses low privileges on the host can influence VirtualBox operations beyond their intended authorization boundary. The impact profile shows high integrity impact with low availability impact and no confidentiality impact, which is consistent with an authorization gap that permits data tampering and service degradation rather than data exfiltration.
Root Cause
The root cause is an improper authorization check within the VirtualBox Core code path. The component fails to enforce the correct privilege boundary before performing a sensitive operation on VirtualBox-accessible data. As a result, a caller operating with limited rights on the host can drive the Core into actions reserved for a higher-privileged context.
Attack Vector
The attack vector is local. The adversary must authenticate to the host running Oracle VM VirtualBox with at least low-level privileges. Exploitation also requires a second user to perform an action, such as opening a crafted virtual machine, accepting a prompt, or interacting with a manipulated VirtualBox artifact.
Once the second user interacts, the attacker gains unauthorized write access to critical VirtualBox data and can force a partial denial of service on the hypervisor. No verified public exploit code is available at the time of publication, and the EPSS value indicates a low probability of near-term in-the-wild exploitation.
No verified proof-of-concept code has been released. Refer to the Oracle Security Alert - July 2026 for the authoritative technical description.
Detection Methods for CVE-2026-47053
Indicators of Compromise
- Unexpected modification, creation, or deletion of .vbox, .vdi, .vmdk, or VirtualBox configuration files by non-administrative users.
- VirtualBox service or VBoxSVC process crashes, restarts, or hangs correlated with a local user session.
- Local user accounts writing to VirtualBox machine folders outside their own profile scope.
Detection Strategies
- Monitor host filesystem activity around VirtualBox installation and machine directories for writes performed by low-privileged accounts.
- Alert on abnormal invocations of VBoxManage, VBoxHeadless, or VirtualBox binaries that immediately precede VM configuration changes.
- Correlate interactive user sessions with VM state changes to identify the human-interaction step required by this vulnerability.
Monitoring Recommendations
- Enable process and file audit logging on VirtualBox hosts and forward events to a centralized analytics platform.
- Track version inventory of Oracle VM VirtualBox across the estate and flag any host still running 7.2.12.
- Baseline normal VirtualBox API and CLI activity per user, then alert on deviations that suggest privilege boundary crossings.
How to Mitigate CVE-2026-47053
Immediate Actions Required
- Apply the fixes published in the Oracle July 2026 Critical Patch Update to all systems running Oracle VM VirtualBox 7.2.12.
- Restrict interactive host logon on VirtualBox systems to trusted administrators only.
- Instruct users to avoid opening .vbox files or VMs received from untrusted sources until patching is complete.
Patch Information
Oracle addressed CVE-2026-47053 in the July 2026 Critical Patch Update. Administrators should upgrade Oracle VM VirtualBox to the fixed release identified in the Oracle Security Alert - July 2026. Verify installed versions on every host and confirm the update after deployment.
Workarounds
- Limit local host access to VirtualBox systems using operating system access controls and just-in-time administration.
- Enforce least privilege on VirtualBox machine folders so only intended users can read or modify VM artifacts.
- Require code signing or provenance validation for VM images before users import or launch them.
# Verify installed Oracle VM VirtualBox version on the host
VBoxManage --version
# Linux: restrict access to a VirtualBox machine directory
chown -R vboxuser:vboxusers /home/vboxuser/VirtualBox\ VMs
chmod -R 700 /home/vboxuser/VirtualBox\ VMs
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
