CVE-2024-21338
Windows Kernel Elevation of Privilege Vulnerability
Windows Kernel Elevation of Privilege Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Windows Kernel Elevation of Privilege Vulnerability
Windows Kernel Elevation of Privilege Vulnerability
- Record
CVE-2024-21338- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C - Weakness
- CWE-822
- Updated
- 2026-11-02
EUVDEUVD-2024-19050
Windows Kernel Elevation of Privilege Vulnerability
- Record
EUVD-2024-19050- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-jqrq-gqwg-r8r5
Windows Kernel Elevation of Privilege Vulnerability
Windows Kernel Elevation of Privilege Vulnerability
- Record
GHSA-jqrq-gqwg-r8r5- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-822
- Updated
- 2026-11-02
CISA KEV No score
Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability
Microsoft Windows Kernel contains an exposed IOCTL with insufficient access control vulnerability within the IOCTL (input and output control) dispatcher in appid.sys that allows a local attacker to achieve privilege escalation.
- Record
CVE-2024-21338- Weakness
- CWE-822
- Updated
- 2026-11-02
NVD
Windows Kernel Elevation of Privilege Vulnerability
- Record
CVE-2024-21338- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-822
- Updated
- 2026-11-02
Affected products
- microsoft windows
- microsoft windows 10 version 1809
- microsoft windows 10 version 21h2
- microsoft windows 10 version 22h2
- microsoft windows 11 version 21h2
- microsoft windows 11 version 22h2
- microsoft windows 11 version 22h3
- microsoft windows 11 version 23h2
- microsoft windows server 2019
- microsoft windows server 2019 (server core installation)
- microsoft windows server 2022
- microsoft windows server 2022, 23h2 edition (server core installation)
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Microsoft Windows 10.0.17763.5458 - Kernel Privilege Escalation | 2024-04-02 |
| PoC in GitHub | hakaioffsec/CVE-2024-21338 | 2024-04-13 |
| PoC in GitHub | UMU618/CVE-2024-21338 | 2024-04-17 |
| PoC in GitHub | wusijie/CVE-2024-21338-1 | 2024-05-05 |
| PoC in GitHub | Zombie-Kaiser/CVE-2024-21338-x64-build- | 2024-05-18 |
| PoC in GitHub | tykawaii98/CVE-2024-21338_PoC | 2024-06-23 |
| PoC in GitHub | Crowdfense/CVE-2024-21338 | 2024-07-29 |
| PoC in GitHub | hackyboiz/kcfg-bypass | 2025-01-12 |
| Exploit-DB | Microsoft Windows 11 - Kernel Privilege Escalation | 2025-04-22 |
| PoC in GitHub | MistyFir/CVE-2024-21338-Exploit | 2026-03-11 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation, exploits | ||
| first indexed | CVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-21338 is a high vulnerability (CVSS 7.8) in Microsoft Windows, published February 13, 2024. CISA lists it as known to be exploited, since March 4, 2024. EUVD reports exploitation since March 4, 2024. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 59.8%, the 99th percentile. No source names a fixed version.
References
msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21338
exploit-db.com/exploits/52275
packetstorm.news/files/id/190586
decoded.avast.io/janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-admin-to-kernel-zero-day
nvd.nist.gov/vuln/detail/CVE-2024-21338
github.com/advisories/GHSA-jqrq-gqwg-r8r5