CVE-2024-43642
HighWindows SMB Denial of Service Vulnerability
Published Nov 12, 2024 · Updated Jul 8, 2025
Key Facts
Patch immediately- CVE-2024-43642 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Windows 11 22h2 (Microsoft), Windows 11 23h2 (Microsoft), Windows 11 24h2 (Microsoft) and 9 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 63% probability of exploitation in the next 30 days.
- Fixed versions are available, including Windows 11 22h2 10.0.22621.4460, Windows 11 23h2 10.0.22631.4460, Windows 11 24h2 10.0.26100.2314.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
63%
Higher than 99.1% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2024-43642 brief as a PDF
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Description
Windows SMB Denial of Service Vulnerability
Affected Products
17 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 11 22h2Microsoft | See advisory | 10.0.22621.4460 |
| Windows 11 23h2Microsoft | See advisory | 10.0.22631.4460 |
| Windows 11 24h2Microsoft | See advisory | 10.0.26100.2314 |
| Windows Server 2022Microsoft | >= 10.0.20348.0 | 10.0.20348.2849 |
| Windows Server 2022 23h2Microsoft | See advisory | 10.0.25398.1251 |
Patched Releases
Windows 11 22h2
10.0.22621.4460
Windows 11 23h2
10.0.22631.4460
Windows 11 24h2
10.0.26100.2314
Windows Server 2022
10.0.20348.2849
Windows Server 2022 23h2
10.0.25398.1251
Windows Server 2025
10.0.26100.2314
Windows 11 version 22H2
10.0.22621.4460
Windows 11 version 22H3
10.0.22631.4460
Windows 11 Version 23H2
10.0.22631.4460
Windows 11 Version 24H2
10.0.26100.2314
Windows Server 2022, 23H2 Edition (Server Core installation)
10.0.25398.1251
Windows Server 2025 (Server Core installation)
10.0.26100.2314
Timeline
Publicly disclosed
Nov 12, 2024
Last updated
Jul 8, 2025
Weakness Type
- CWE-416 Use After Free
References
FAQ
Common Questions.
Windows SMB Denial of Service Vulnerability
Affected: Windows 11 22h2 (Microsoft); Windows 11 23h2 (Microsoft); Windows 11 24h2 (Microsoft), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Windows 11 22h2 10.0.22621.4460, Windows 11 23h2 10.0.22631.4460, Windows 11 24h2 10.0.26100.2314.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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