Local denial of service via EFI file access
Published Jan 11, 2022 · Updated Jan 2, 2025
Improper authorization in the Windows kernel of affected Microsoft Windows releases allows local users to interrupt system availability. The kernel applies incorrect authorization logic when low-privileged code accesses files on the EFI partition, enabling denial of service. Exploitation requires prior local low-privileged code execution; published sources disclose no data access, modification, or privilege gain.
Summary
What happened
Improper authorization in the Windows kernel of affected Microsoft Windows releases allows local users to interrupt system availability. The kernel applies incorrect authorization logic when low-privileged code accesses files on the EFI partition, enabling denial of service. Exploitation requires prior local low-privileged code execution; published sources disclose no data access, modification, or privilege gain.
The record
- CVE
- CVE-2022-21899
- Published
- Jan 11, 2022
- Updated
- Jan 2, 2025
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 11, 2022CVE publishedPublication date reported by the CVE source.
- Jan 2, 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=10.0.10240.0 <10.0.10240.19177
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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