Microsoft Brokering File System Vulnerability Let Attackers Escalate Privileges

Microsoft has patched a significant use-after-free vulnerability in its Brokering File System (BFS) driver, tracked as CVE-2025-29970. The flaw enables local attackers to escalate privileges on Windows systems running isolated or sandboxed applications, making it a notable concern for enterprise security. The vulnerability exists in bfs.sys, a minifilter driver developed alongside Windows AppContainer and AppSilo, […]

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