CVE-2021-26381 - Vulnerability Details - OpenCVE

Improper system call parameter validation in the Trusted OS may allow a malicious driver to perform mapping or unmapping operations on a large number of pages, potentially resulting in kernel memory corruption.

Attack Vector Local

Attack Complexity High

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact total

No data.

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4013.html
https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6024.html

History

Tue, 10 Feb 2026 21:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Tue, 10 Feb 2026 20:00:00 +0000

Type	Values Removed	Values Added
Description		Improper system call parameter validation in the Trusted OS may allow a malicious driver to perform mapping or unmapping operations on a large number of pages, potentially resulting in kernel memory corruption.
Weaknesses		CWE-770
References		https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4013.html https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6024.html
Metrics		cvssV4_0 `{'score': 7.1, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: AMD

Published: 2026-02-10T19:47:26.356Z

Updated: 2026-02-10T20:38:02.533Z

Reserved: 2021-01-29T21:24:26.159Z

Link: CVE-2021-26381

Vulnrichment

Updated: 2026-02-10T20:37:58.361Z

NVD

Status : Awaiting Analysis

Published: 2026-02-10T20:16:41.110

Modified: 2026-02-10T21:51:48.077

Link: CVE-2021-26381

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-770

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