ZDI-CAN-27938: ZDI-26-102: Oracle VirtualBox VMSVGA Out-Of-Bounds Write Local Privilege Escalation Vulnerability

Published Feb 13, 2026

Updated

This vulnerability allows local attackers to escalate privileges on affected installations of Oracle VirtualBox. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.5. The following CVEs are assigned: CVE-2026-21957.

Affected Software

1 affected component

Oracle VirtualBox

Event History

Feb 13, 2026

Advisory Published

via ZDI·06:00 AM

Data Sourced

via ZDI·06:00 AM

Description

Frequently Asked Questions

What is the severity of ZDI-CAN-27938?

The severity of ZDI-CAN-27938 is critical due to its ability to allow local privilege escalation on affected Oracle VirtualBox installations.

How do I fix ZDI-CAN-27938?

To fix ZDI-CAN-27938, users should update their Oracle VirtualBox to the latest version provided by Oracle that addresses this vulnerability.

Who is affected by ZDI-CAN-27938?

Users of Oracle VirtualBox are affected by ZDI-CAN-27938 if they have not applied the latest security patches.

What type of attack does ZDI-CAN-27938 enable?

ZDI-CAN-27938 enables local privilege escalation attacks, allowing attackers to gain higher privileges on a compromised system.

Is ZDI-CAN-27938 being exploited in the wild?

There is currently no public information indicating that ZDI-CAN-27938 is being actively exploited in the wild.