CVE-2024-21338 Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control
An attacker can exploit a flaw in the Windows Kernel to elevate privileges, requiring a security patch from Microsoft.
- Exploited in the wild
- Since 4 Mar 2024
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-21338?
CVE-2024-21338 is a high-severity vulnerability in Microsoft Windows 10 1809, published on 13 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Windows Kernel Elevation of Privilege Vulnerability
Weakness: CWE-822
Which versions are affected by CVE-2024-21338?
It affects 9 products.
Products include Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 21h2, Microsoft Windows 11 22h2, Microsoft Windows 11 23h2 and 3 more.
How do I fix CVE-2024-21338?
No fix has been published for CVE-2024-21338 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 25 Mar 2024.
Is CVE-2024-21338 being exploited?
Yes. Attackers have exploited CVE-2024-21338 in the wild since at least 4 Mar 2024, including in ransomware campaigns.
Public exploit code: 2 Exploit-DB entries and 9 proofs of concept on GitHub.
Other vulnerabilities in Microsoft Windows 10 1809
- CVE-2024-29988 Microsoft SmartScreen Prompt Security Feature Bypass
- CVE-2024-21412 Microsoft Windows Internet Shortcut Files Security Feature Bypass
- CVE-2025-62221 Microsoft Windows Use After Free
- CVE-2025-30400 Microsoft Windows DWM Core Library Use-After-Free
- CVE-2023-36033 Microsoft Windows Desktop Window Manager (DWM) Core Library Privilege Escalation
Sources
Also known as GHSA-jqrq-gqwg-r8r5.