# CVE-2023-23376: Microsoft Windows Common Log File System (CLFS) Driver Privilege Escalation Vulnerability

Source: https://junglewise.ai/threats/cve-2023-23376-microsoft-windows-common-log-file-system-clfs-driver-privilege  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-02-14. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2023-23376 · Severity: critical · CVSS 7.8 · Exploited in the wild · Published 2023-02-14

A privilege escalation vulnerability exists in the Microsoft Windows Common Log File System (CLFS) driver due to a heap-based buffer overflow. An attacker who successfully exploits this vulnerability could gain SYSTEM privileges. The vulnerability has been observed being exploited in the wild.

Technologies: [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2023-23376 exploited in the wild?** Yes. CVE-2023-23376 is known to be exploited in the wild, first recorded on 14 February 2023. Treat it as urgent.

**How severe is CVE-2023-23376?** Critical severity, with a CVSS score of 7.8, published 14 February 2023.

**Which products and versions are affected?** Microsoft Windows 10 up to (excluding) 10.0.10240.19747; Microsoft Windows 11 21H2, 22H2; Microsoft Windows Server 2008 SP2, R2 SP1; Microsoft Windows Server 2012 Gold, R2; and 3 more.

**Is there a fix for CVE-2023-23376?** A patch was published on 2023-02-14. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2023-23376 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2023-23376?** Check whether you run Microsoft Windows. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft Windows 10 up to (excluding) 10.0.10240.19747
- Microsoft Windows 11 21H2, 22H2
- Microsoft Windows Server 2008 SP2, R2 SP1
- Microsoft Windows Server 2012 Gold, R2
- Microsoft Windows Server 2016
- Microsoft Windows Server 2019
- Microsoft Windows Server 2022

## Timeline

- 2023-02-14: disclosed
- 2023-02-14: patched
- 2023-02-14: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2023-02-14: exploited

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