ZDI-CAN-27870: ZDI-26-098: Oracle VirtualBox VMSVGA Use-After-Free 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 8.2. The following CVEs are assigned: CVE-2026-21955.

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-27870?

The severity of ZDI-CAN-27870 is high due to its potential for local privilege escalation.

How do I fix ZDI-CAN-27870?

To fix ZDI-CAN-27870, apply the latest security patches provided by Oracle for VirtualBox.

Who is affected by ZDI-CAN-27870?

Users of Oracle VirtualBox installations are affected by ZDI-CAN-27870.

What type of vulnerability is ZDI-CAN-27870?

ZDI-CAN-27870 is a use-after-free vulnerability that can lead to local privilege escalation.

What must an attacker do to exploit ZDI-CAN-27870?

To exploit ZDI-CAN-27870, an attacker must have the ability to execute high-privileged code on the target guest.