Kernel memory corruption via excessive page mapping
Published Feb 10, 2026 · Updated Feb 10, 2026
Resource-allocation flaw in the AMD Trusted OS allows local privileged attackers to corrupt kernel memory through a malicious driver. The Trusted OS system-call handler fails to validate page-count parameters before mapping or unmapping a driver-requested number of pages. Exploitation requires local high privileges and a malicious kernel driver; the documented consequence is kernel-memory corruption, not remote compromise.
Summary
What happened
Resource-allocation flaw in the AMD Trusted OS allows local privileged attackers to corrupt kernel memory through a malicious driver. The Trusted OS system-call handler fails to validate page-count parameters before mapping or unmapping a driver-requested number of pages. Exploitation requires local high privileges and a malicious kernel driver; the documented consequence is kernel-memory corruption, not remote compromise.
The record
- CVE
- CVE-2021-26381
- Published
- Feb 10, 2026
- Updated
- Feb 10, 2026
- Vendor
- Advanced Micro Devices, Inc.
- Product
- AMD Ryzen™ Embedded V1000 Series Processors
- Classifications
- CWE-770
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Feb 10, 2026CVE publishedPublication date reported by the CVE source.
- Feb 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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