CVE-2024-21338

Windows Kernel Elevation of Privilege Vulnerability

CVE-2024-21338 is fixed in 20 products on 1 platform, first by KB5034768, released February 13, 2024. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on March 4, 2024, with known ransomware use. Patch Radar priority: Patch now.

Patch nowCISA KEVKnown ransomware use

CVSS

7.8

Important

Exploitation

Exploited

Reported by the vendor

CISA KEV

Mar 4, 2024

Federal due date Mar 25, 2024. Known ransomware use

EPSS

0.5981

99th percentile

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 10 Version 1809 for 32-bit Systems	17763.5458	KB5034768	Feb 13, 2024
Windows 10 Version 1809 for ARM64-based Systems	17763.5458	KB5034768	Feb 13, 2024
Windows 10 Version 1809 for x64-based Systems	17763.5458	KB5034768	Feb 13, 2024
Windows 10 Version 21H2 for 32-bit Systems		KB5034763	Feb 13, 2024
Windows 10 Version 21H2 for ARM64-based Systems		KB5034763	Feb 13, 2024
Windows 10 Version 21H2 for x64-based Systems		KB5034763	Feb 13, 2024
Windows 10 Version 22H2 for 32-bit Systems		KB5034763	Feb 13, 2024
Windows 10 Version 22H2 for ARM64-based Systems		KB5034763	Feb 13, 2024
Windows 10 Version 22H2 for x64-based Systems		KB5034763	Feb 13, 2024
Windows 11 Version 22H2 for ARM64-based Systems		KB5034765	Feb 13, 2024
Windows 11 Version 22H2 for x64-based Systems		KB5034765	Feb 13, 2024
Windows 11 Version 23H2 for ARM64-based Systems		KB5034765	Feb 13, 2024
Windows 11 Version 23H2 for x64-based Systems		KB5034765	Feb 13, 2024
Windows 11 version 21H2 for ARM64-based Systems	22000.2777	KB5034766	Feb 13, 2024
Windows 11 version 21H2 for x64-based Systems	22000.2777	KB5034766	Feb 13, 2024
Windows Server 2019	17763.5458	KB5034768	Feb 13, 2024
Windows Server 2019 (Server Core installation)	17763.5458	KB5034768	Feb 13, 2024
Windows Server 2022	20348.2322	KB5034770	Feb 13, 2024
Windows Server 2022 (Server Core installation)	20348.2322	KB5034770	Feb 13, 2024
Windows Server 2022, 23H2 Edition (Server Core installation)	25398.709	KB5034769	Feb 13, 2024

Details

Published
February 13, 2024
Weakness
Untrusted Pointer Dereference
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338

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