CVE-2026-71125 Overview
CVE-2026-71125 affects the Core component of Oracle VM VirtualBox version 7.2.14. A local attacker with logon access to the infrastructure running VirtualBox can trigger a hang or repeatable crash, resulting in a complete denial of service. The vulnerability also permits unauthorized update, insert, or delete operations against some VirtualBox-accessible data. Exploitation requires user interaction from a person other than the attacker. Oracle disclosed the issue in the August 2026 Critical Patch Update.
Critical Impact
Successful exploitation causes a complete denial of service against Oracle VM VirtualBox and enables limited integrity impact on accessible data.
Affected Products
- Oracle VM VirtualBox 7.2.14
- Oracle Virtualization (Core component)
- Deployments running the affected VirtualBox release on any supported host operating system
Discovery Timeline
- 2026-08-18 - CVE-2026-71125 published to the National Vulnerability Database
- 2026-08-20 - Last updated in NVD database
Technical Details for CVE-2026-71125
Vulnerability Analysis
The flaw resides in the Core component of Oracle VM VirtualBox 7.2.14. The Core component handles central hypervisor functions including virtual machine lifecycle management, device emulation coordination, and guest-host interactions. A defect in this component allows an unauthenticated local attacker to induce a hang or a frequently repeatable crash of the VirtualBox process. The same code path also allows unauthorized modification of a subset of data reachable by VirtualBox.
Exploitation requires the attacker to already possess local logon access to the host running VirtualBox. It further requires interaction from a separate user, such as opening a crafted file, launching a prepared virtual machine, or interacting with a manipulated guest configuration. The scope remains unchanged, meaning the impact is bounded to the VirtualBox process and its accessible resources.
Root Cause
Oracle has not published detailed root cause information beyond the affected component. The advisory attributes integrity and availability impact with no confidentiality impact, indicating the defect corrupts state or exhausts resources rather than leaking data. Refer to the Oracle Security Alert for vendor-provided technical details.
Attack Vector
The attack vector is local. An attacker authenticated to the host system triggers the vulnerable code path in the Core component. A second user must perform an action, such as starting a virtual machine or opening a crafted virtualization artifact, to complete the exploitation chain. The result is a hypervisor process crash or hang, with possible unauthorized writes to accessible data.
No public proof-of-concept code is available for CVE-2026-71125. See the Oracle Security Alert for the authoritative technical description.
Detection Methods for CVE-2026-71125
Indicators of Compromise
- Repeated unexpected termination or hang of the VBoxHeadless, VirtualBoxVM, or VBoxSVC processes on affected hosts
- Virtual machine crash dumps or host event log entries correlated with guest startup or user-initiated VM actions
- Unexpected modifications to VirtualBox configuration files, .vbox machine definitions, or shared virtual disk metadata
Detection Strategies
- Inventory hosts running Oracle VM VirtualBox and flag any instance reporting version 7.2.14
- Alert on abnormal process exit codes or repeated restarts of VirtualBox service processes
- Monitor file integrity on VirtualBox configuration directories and virtual machine storage paths
Monitoring Recommendations
- Correlate VirtualBox process crashes with the user account and preceding interactive activity on the host
- Track EPSS scoring updates for CVE-2026-71125 to detect changes in exploitation likelihood
- Review host authentication logs for local logons preceding VirtualBox instability events
How to Mitigate CVE-2026-71125
Immediate Actions Required
- Identify all systems running Oracle VM VirtualBox 7.2.14 and prioritize them for patching
- Apply the fixes published in the Oracle August 2026 Critical Patch Update
- Restrict local logon rights on hosts running VirtualBox to trusted administrators only
- Educate users about opening virtual machine artifacts from untrusted sources
Patch Information
Oracle addresses CVE-2026-71125 in the August 2026 Critical Patch Update. Consult the Oracle Security Alert for the corresponding fixed release of Oracle VM VirtualBox and apply it on all affected hosts.
Workarounds
- Limit interactive access to hosts running VirtualBox until the patched version is deployed
- Avoid importing or executing untrusted .vbox, .ova, or virtual disk files on affected systems
- Suspend non-essential virtual machines on VirtualBox 7.2.14 hosts until remediation is complete
# Verify installed Oracle VM VirtualBox version on Linux or macOS hosts
VBoxManage --version
# Verify installed version on Windows
"C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" --version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
