Windows Kernel Elevation of Privilege Vulnerability

cisa required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

1. 2024-02-12 CISA SSVC: exploitation active
2. 2024-02-13 0-day patched (Project Zero)
3. 2024-02-13 Published
4. 2024-03-04 Added to CISA KEV
5. 2024-03-25 CISA patch deadline
6. 2024-04-02 First public exploit (EDB-51946)

Added

2 y ago (2024-03-04)

Patch by

2024-03-25 (2 y ago)

Ransomware

Known to be used in ransomware campaigns

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Vendor, product

Microsoft, Windows

CISA name

Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Patched

2024-02-13

Details

project zero tracker

Exploitation

Active, exploited in the wild

Automatable

no

Technical impact

total

Assessed

2 y ago (2024-02-12)

59.81% chance of exploitation in the next 30 days, higher than 99.1% of all scored CVEs (FIRST EPSS, 2026-11-08).

• EDB-52275 Microsoft Windows 11 - Kernel Privilege Escalation local, 2025-04-22
• EDB-51946 Microsoft Windows 10.0.17763.5458 - Kernel Privilege Escalation local, 2024-04-02
• packetstorm.news https://packetstorm.news/files/id/190586/ referenced PoC, tagged "exploit" by a source, unverified
• decoded.avast.io https://decoded.avast.io/janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-admin-to-kernel-zero-day/ referenced PoC, tagged "exploit" by a source, unverified

• 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)

Weakness

• CWE-822 Untrusted Pointer Dereference

• msrc.microsoft.com /update-guide/vulnerability/CVE-2024-21338

  vendor-advisory, patch

• exploit-db.com /exploits/52275

  exploit, vdb-entry

• packetstorm.news /files/id/190586/

  exploit, vdb-entry

• decoded.avast.io /janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-admin-to-kernel-zero-day/

  exploit, technical-description, third-party-advisory

• cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21338

  government-resource, us-government-resource

• CVE List CVE-2024-21338
• NVD CVE-2024-21338

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