PT-2025-20973 · Microsoft · Brokering File System+1
Published
2025-05-13
·
Updated
2025-12-22
·
CVE-2025-29970
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Microsoft Brokering File System (affected versions not specified)
Description
An elevation-of-privilege issue exists in the Microsoft Brokering File System. This allows an authorized attacker to elevate privileges locally. The issue is related to a use-after-free condition, where memory is accessed after it has been freed. Exploitation of this issue may allow an attacker to affect the system. The Microsoft Brokering File System is a driver that was introduced with Win32-App-isolation, a sandbox-like mechanism to separate application access to resources on Windows clients. The driver has been a recurring source of vulnerabilities in recent Patch Tuesdays and remains a promising attack surface due to increasing efforts in sandboxing applications on Windows.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
LPE
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Brokering File System
Windows