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CVE-2024-49138

Microsoft Windows Common Log File System (CLFS) Driver Heap-Based Buffer Overflow

7.8 HIGHActively exploited (CISA KEV)Public exploitEPSS 26.2%
  1. Published12 Dec 2024
  2. Added to CISA KEV10 Dec 2024
  3. Remediation due31 Dec 2024
Actively exploited (CISA KEV)

Microsoft Windows Common Log File System (CLFS) driver contains a heap-based buffer overflow vulnerability that allows a local attacker to escalate privileges.

Added to KEV: 10 Dec 2024Federal remediation due: 31 Dec 2024

Description

Windows Common Log File System Driver Elevation of Privilege Vulnerability

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 10 1507< 10.0.10240.20857
Microsoft Windows 10 1607< 10.0.14393.7606
Microsoft Windows 10 1809< 10.0.17763.6659
Microsoft Windows 10 21h2< 10.0.19044.5247
Microsoft Windows 10 22h2< 10.0.19045.5247
Microsoft Windows 11 22h2< 10.0.22621.4602
Microsoft Windows 11 23h2< 10.0.22631.4602
Microsoft Windows 11 24h2< 10.0.26100.2605
Microsoft Windows Server 2008r2 · sp2
Microsoft Windows Server 2012r2
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< 10.0.25398.1308
Microsoft Windows Server 2025< 10.0.26100.2605

Remediation

Fixed in
Microsoft Windows 10 1507≥ 10.0.10240.20857
Microsoft Windows 10 1607≥ 10.0.14393.7606
Microsoft Windows 10 1809≥ 10.0.17763.6659
Microsoft Windows 10 21h2≥ 10.0.19044.5247
Microsoft Windows 10 22h2≥ 10.0.19045.5247
Microsoft Windows 11 22h2≥ 10.0.22621.4602
Microsoft Windows 11 23h2≥ 10.0.22631.4602
Microsoft Windows 11 24h2≥ 10.0.26100.2605
Microsoft Windows Server 2016≥ 10.0.14393.7606
Microsoft Windows Server 2019≥ 10.0.17763.6659

References

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Frequently asked

Is CVE-2024-49138 being actively exploited?

Yes. CVE-2024-49138 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 10 Dec 2024.

How severe is CVE-2024-49138?

CVE-2024-49138 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 26.2% probability of exploitation.

Which products are affected by CVE-2024-49138?

Affected products include Microsoft Windows 10 1507, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, and 10 more.

How do I fix CVE-2024-49138?

Upgrade affected software to a fixed version, for example Microsoft Windows 10 1507 10.0.10240.20857, Microsoft Windows 10 1607 10.0.14393.7606, Microsoft Windows 10 1809 10.0.17763.6659 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-49138 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.