# CVE-2024-21338

Windows Kernel Elevation of Privilege Vulnerability

- Page: https://www.vulneraibility.com/cve/CVE-2024-21338
- CVSS: 7.8
- Known exploited: yes, in CISA KEV since 2024-03-04; CISA due date 2024-03-25; known ransomware use
- EPSS: 62.21% (percentile 99.2)
- Public exploit code: 2 on Exploit-DB · 8 GitHub proofs of concept (first 2024-04-02)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2024-02-12)
- Weakness: CWE-822
- Published: 2024-02-13

## Affected versions

- Microsoft Windows 10 Version 1809: affected >= 10.0.17763.0 and < 10.0.17763.5458; >= 10.0.0 and < 10.0.17763.5458
- Microsoft Windows 10 Version 21H2: affected >= 10.0.19043.0 and < 10.0.19044.4046
- Microsoft Windows 10 Version 22H2: affected >= 10.0.19045.0 and < 10.0.19045.4046
- Microsoft Windows 11 version 21H2: affected >= 10.0.0 and < 10.0.22000.2777
- Microsoft Windows 11 version 22H2: affected >= 10.0.22621.0 and < 10.0.22621.3155
- Microsoft Windows 11 version 22H3: affected >= 10.0.22631.0 and < 10.0.22631.3155
- Microsoft Windows 11 Version 23H2: affected >= 10.0.22631.0 and < 10.0.22631.3155
- Microsoft Windows Server 2019: affected >= 10.0.17763.0 and < 10.0.17763.5458
- Microsoft Windows Server 2019 (Server Core installation): affected >= 10.0.17763.0 and < 10.0.17763.5458
- Microsoft Windows Server 2022: affected >= 10.0.20348.0 and < 10.0.20348.2322
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): affected >= 10.0.25398.0 and < 10.0.25398.709

A version outside these ranges is not a statement that it is unaffected.

## References

- [patch] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21338
- [other] https://www.exploit-db.com/exploits/52275
- [other] https://packetstorm.news/files/id/190586/
- [other] https://decoded.avast.io/janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-admin-to-kernel-zero-day/

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.