Oracle VirtualBox VMSVGA Use-After-Free Local Privilege Escalation Vulnerability

CVE-2026-21955 is a privilege escalation vulnerability affecting Oracle VirtualBox that allows local attackers with high-privilege code execution on a guest system to further escalate their privileges, rated as HIGH severity with a CVSS score of 8.2. An attacker exploiting this flaw could gain unauthorized elevated access within the virtualized environment, potentially compromising the host or other systems. Security teams should prioritize patching Oracle VirtualBox installations, especially those in environments where guest isolation is critical, and monitor for any suspicious privilege escalation attempts on affected systems.