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CVE-2025-24983

High CVSS 7 Known exploited

Published 2025-03-11 · last changed 2026-06-17 · added to CISA KEV 2025-03-11

This one is being exploited in the wild.

CISA added CVE-2025-24983 to the Known Exploited Vulnerabilities catalog on 2025-03-11. Federal agencies are required to remediate it on a deadline. If you have affected machines, this is the class of finding that moves ahead of the rest of the queue.

The fix

Microsoft fixes this in updatesKB5053618, KB5053594, KB5053888, KB5053995, KB5053620, KB5053627, KB5053886, KB5053887. The fixed build differs per Windows version, so the row that matters is the one matching the machine you are looking at.

Windows version Fixed in build Update Released
Windows 10 for 32-bit Systems 10.0.10240.20947 KB5053618 2026-09-17
Windows 10 for x64-based Systems 10.0.10240.20947 KB5053618 2026-09-17
Windows 10 Version 1607 for 32-bit Systems 10.0.14393.7876 KB5053594 2026-09-17
Windows 10 Version 1607 for x64-based Systems 10.0.14393.7876 KB5053594 2026-09-17
Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.23168 KB5053888, KB5053995 2026-09-17
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.23168 KB5053888, KB5053995 2026-09-17
Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.23168 KB5053888, KB5053995 2026-09-17
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.23168 KB5053888, KB5053995 2026-09-17
Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.27618 KB5053620, KB5053627 2026-09-17
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.27618 KB5053620, KB5053627 2026-09-17
Windows Server 2012 6.2.9200.25368 KB5053886 2026-09-17
Windows Server 2012 R2 6.3.9600.22470 KB5053887 2026-09-17
Windows Server 2012 R2 (Server Core installation) 6.3.9600.22470 KB5053887 2026-09-17
Windows Server 2012 (Server Core installation) 6.2.9200.25368 KB5053886 2026-09-17
Windows Server 2016 10.0.14393.7876 KB5053594 2026-09-17
Windows Server 2016 (Server Core installation) 10.0.14393.7876 KB5053594 2026-09-17

Having the KB is not the same as knowing whether a machine has it. Windows updates supersede each other, so the update you installed often covers a fix that shipped in an earlier one. Paste your build into the patch checker and it walks that chain for you.

What it is

Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.

Sources

CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H