CVE-2025-59260: Microsoft Failover Cluster Virtual Driver Information Disclosure Vulnerability

Overview

Severity
Medium (CVSS 5.5)
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Category
Information Disclosure
Exploit Status
Not Exploited
Exploitation Likelihood
Less Likely
Patch Tuesday
2025-Oct
Released
2025-10-14
EPSS Score
0.07% (percentile: 20.3%)

Description

Exposure of sensitive information to an unauthorized actor in Microsoft Failover Cluster Virtual Driver allows an authorized attacker to disclose information locally.

FAQ

What type of information could be disclosed by this vulnerability? Exploiting this vulnerability could allow the disclosure of certain memory address within kernel space. Knowing the exact location of kernel memory could be potentially leveraged by an attacker for other malicious activities.

Affected Products (9)

Windows

  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)
  • Windows Server 2025 (Server Core installation)
  • Windows Server 2022, 23H2 Edition (Server Core installation)
  • Windows Server 2025
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)

Security Updates (5)

Acknowledgments

<a href="https://twitter.com/lewislee53">Lewis Lee</a>, <a href="https://twitter.com/ver0759">Chunyang Han</a> and <a href="https://twitter.com/edwardzpeng">Zhiniang Peng</a> with HUST, <a href="https://twitter.com/ver0759">Chunyang Han</a>, <a href="https://twitter.com/ver0759">Chunyang Han</a>, <a href="https://twitter.com/lewislee53">Lewis Lee</a>, <a href="https://twitter.com/ver0759">Chunyang Han</a> and <a href="https://twitter.com/edwardzpeng">Zhiniang Peng</a> with HUST

Revision History

  • 2025-10-14: Information published.