Oracle VirtualBox VMSVGA Use-After-Free Local Privilege Escalation Vulnerability (CVE-2026-21955)

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 specific flaw exists within the VMSVGA device.

The issue results from the lack of validating the existence of an object prior to performing operations on the object.

An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor.

Oracle has issued an update to correct this vulnerability.

I am one of the editors here at www.systemtek.co.uk I am a UK based technology professional, with an interest in computer security and telecoms.