Local privilege escalation via kernel use-after-free
Published Mar 12, 2024 · Updated May 3, 2025
Use-after-free in the Windows kernel across affected Windows 10, Windows 11, and Windows Server builds allows local users to gain privileges. Microsoft identifies the weakness class but has not published the freed object, affected code path, triggering operation, or resulting privilege level. Exploitation requires low local privileges and user interaction, and successful exploitation permits unauthorized elevation with system-wide impact.
Summary
What happened
Use-after-free in the Windows kernel across affected Windows 10, Windows 11, and Windows Server builds allows local users to gain privileges. Microsoft identifies the weakness class but has not published the freed object, affected code path, triggering operation, or resulting privilege level. Exploitation requires low local privileges and user interaction, and successful exploitation permits unauthorized elevation with system-wide impact.
The record
- CVE
- CVE-2024-21443
- Published
- Mar 12, 2024
- Updated
- May 3, 2025
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 12, 2024CVE publishedPublication date reported by the CVE source.
- May 3, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.5576
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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