CVE-2024-21338
Windows Kernel Elevation of Privilege Vulnerability
High
Known exploited
- Severity
- 7.8 / 10
- High · CVSS 3.1
- Exploit chance (EPSS)
- 59.81%
- Chance of exploitation in the next 30 days. Higher than 99.13% of scored vulnerabilities.
- Known exploited
- Yes
- In CISA's catalog since Mar 4, 2024
- Weakness
- CWE-822 Untrusted Pointer Dereference
- Fix
- None yet
- No fixed version published
Exploited in the wild. Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability (Microsoft Windows). Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Due for U.S. federal agencies by Mar 25, 2024. Known to be used in ransomware campaigns.
Description
Windows Kernel Elevation of Privilege Vulnerability
How to fix
No fixed version has been published yet. Until one is, remove or replace the package, or turn off or isolate the affected feature. This page updates when a fix ships.
Severity breakdown
CVSS 3.1 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Weakness
CWE-822: Untrusted Pointer Dereference
The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.
References
Advisories
Exploits and evidence
Other links
Timeline
- Published
- Added to CISA's Known Exploited Vulnerabilities catalog
- Remediation due for U.S. federal agencies
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| CVE-2025-24990 Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported Windows operating systems. | High Known exploited | Same weakness, CWE-822 |
| CVE-2024-35250 Windows Kernel-Mode Driver Elevation of Privilege Vulnerability | High Known exploited | Same weakness, CWE-822 |
| CVE-2023-36033 Windows DWM Core Library Elevation of Privilege Vulnerability | High Known exploited | Same weakness, CWE-822 |
| CVE-2023-29360 Microsoft Streaming Service Elevation of Privilege Vulnerability | High Known exploited | Same weakness, CWE-822 |
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