CVE-2025-55683: Windows Kernel 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
- Last Updated
- 2026-01-02
- EPSS Score
- 0.07% (percentile: 21.8%)
Description
Exposure of sensitive information to an unauthorized actor in Windows Kernel 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>, <a href="https://twitter.com/edwardzpeng">Zhiniang Peng</a> with HUST, <a href="https://twitter.com/lewislee53">Lewis Lee</a>
Revision History
- 2025-10-14: Information published.
- 2026-01-02: Added acknowledgements. This is an informational change only.