cve 2026 62772

This tag covers CVE-2026-62772, an elevation-of-privilege vulnerability in the Windows Container Isolation file-system filter driver, unionfs.sys. Microsoft addressed the flaw in the August 11, 2026 security release. The priority is patching supported Windows container hosts with the applicable August cumulative update, then verifying the update reached every host running Windows Server containers, Kubernetes Windows nodes, or local Windows container development workloads. The Microsoft Security Response Center classifies the issue as a Windows Container Isolation FS Filter Driver elevation-of-privilege flaw. Content here focuses on the patch, affected components, and verification steps for administrators managing container infrastructure.