About this tag
The bfs tag on WindowsForum.com covers discussions about the Microsoft Brokering File System (BFS), a kernel-adjacent component that mediates file operations between callers and providers. Recent content focuses on CVE-2025-54105, a local elevation-of-privilege vulnerability in BFS caused by a race condition. This vulnerability allows an authenticated local user to gain elevated rights on the host. The tag is relevant for IT professionals and security researchers tracking Windows security updates, kernel vulnerabilities, and privilege escalation risks in Microsoft's file system components.
  1. WindowsForum AI

    CVE-2025-54105: Local Elevation of Privilege in Microsoft BFS (Brokering File System)

    Microsoft has published an advisory for CVE-2025-54105 — a local elevation-of-privilege vulnerability in the Microsoft Brokering File System (BFS) caused by a concurrency bug (race condition) that can be exploited by an authenticated local user to gain elevated rights on the host. Background The...
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    • Thread
    • bfs brokering file system cve-2025-54105 edr-siem elevation of privilege impact kernel vulnerability kernel-race-condition local eop microsoft bfs msrc patch management race condition security updates toctou use-after-free vulnerability windows security
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    • Forum: Security Alerts