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CVE-2024-49138: Microsoft Windows Common Log File System (CLFS) Driver Heap-Based Buffer Overflow Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2024-12-10
• EPSS: 26.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-12-12 · updated 2026-06-17
• Weakness: CWE-122

Description

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Affected products

• Microsoft Windows 10 Version 1507: before 10.0.10240.20857 — fixed in 10.0.10240.20857
• Microsoft Windows 10 1607: before 10.0.14393.7606 — fixed in 10.0.14393.7606
• Microsoft Windows 10: before 10.0.17763.6659 — fixed in 10.0.17763.6659
• Microsoft Windows 10: before 10.0.19044.5247 — fixed in 10.0.19044.5247
• Microsoft Windows 10: before 10.0.19045.5247 — fixed in 10.0.19045.5247
• Microsoft Windows 11: before 10.0.22621.4602 — fixed in 10.0.22621.4602
• Microsoft Windows 11: before 10.0.22631.4602 — fixed in 10.0.22631.4602
• Microsoft Windows 11: before 10.0.26100.2605 — fixed in 10.0.26100.2605
• Microsoft Windows Server 2008: r2-sp1, sp2
• Microsoft Windows Server 2012: r2
• Microsoft Windows Server 2016: before 10.0.14393.7606 — fixed in 10.0.14393.7606
• Microsoft Windows Server 2019: before 10.0.17763.6659 — fixed in 10.0.17763.6659
• Microsoft Windows Server 2022: before 10.0.20348.2966 — fixed in 10.0.20348.2966
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1308 — fixed in 10.0.25398.1308
• Microsoft Windows Server 2025: before 10.0.26100.2605 — fixed in 10.0.26100.2605

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 10.0.10240.20857; Microsoft Windows 10 1607 10.0.14393.7606; Microsoft Windows 10 10.0.17763.6659; Microsoft Windows 10 10.0.19044.5247; Microsoft Windows 10 10.0.19045.5247; Microsoft Windows 11 10.0.22621.4602; Microsoft Windows 11 10.0.22631.4602; Microsoft Windows 11 10.0.26100.2605; Microsoft Windows Server 2016 10.0.14393.7606; Microsoft Windows Server 2019 10.0.17763.6659; Microsoft Windows Server 2022 10.0.20348.2966; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1308. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49138
• https://packetstorm.news/files/id/190585/
• https://www.exploit-db.com/exploits/52270
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-49138

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