CVE-2021-26381 Details
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.
A vulnerability exists in AMD Ryzen and Athlon processors due to improper validation of system call parameters in the Trusted Operating System. This flaw may enable a malicious driver to map or unmap a large number of pages, potentially leading to corruption of kernel memory. Affected processors include various models within the Ryzen 3000, 4000, 5000, 7000, 8000, and Athlon 3000 series, as well as certain Ryzen Embedded and Ryzen Threadripper series processors.
Users can update to the latest Platform Initialization (PI) version specific to their processor model. For AMD Ryzen and Athlon processors, this includes ComboAM4PI 1.0.0.9, PicassoPI-FP5 1.0.0.E, and several other specific versions. Consult the AMD Client Processor Revision Guide or contact your AMD Customer Engineering representative for guidance.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Feb 10, 2026CISA-ADP
Assessed Feb 11, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4013.html | [email protected] | AdvisoryBundleRemedyVendor |
| https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6024.html | [email protected] | AdvisoryBundleRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-770 | Allocation of Resources Without Limits or Throttling | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| AMD Athlon 3000 | All versions |
CPE
Remediation
| |
| AMD Ryzen 3000 | All versions |
CPE
Remediation
| |
| AMD Ryzen 4000 | All versions |
CPE
Remediation
| |
| AMD Ryzen 5000 | All versions |
CPE
Remediation
| |
| AMD Ryzen 7000 | All versions |
CPE
Remediation
| |
| AMD Ryzen 8000 | All versions |
CPE
Remediation
| |
| AMD Ryzen 9000 | All versions |
CPE
Remediation
| |
| AMD Ryzen Embedded 5000 | All versions |
CPE
Remediation
| |
| AMD Ryzen Embedded 7000 | All versions |
CPE
Remediation
| |
| AMD Ryzen Embedded 8000 | All versions |
CPE
Remediation
| |
| AMD Ryzen Embedded 9000 | All versions |
CPE
Remediation
| |
| AMD Ryzen Embedded R1000 | All versions |
CPE
Remediation
| |
| AMD Ryzen Embedded R2000 | All versions |
CPE
Remediation
| |
| AMD Ryzen Embedded V1000 | All versions |
CPE
Remediation
| |
| AMD Ryzen Embedded V2000 | All versions |
CPE
Remediation
| |
| AMD Radeon RX 5000 | All versions |
CPE
Remediation
| |
| AMD Radeon RX 6000 | All versions |
CPE
Remediation
| |
| AMD Radeon RX 7000 | All versions |
CPE
Remediation
| |
| AMD Radeon PRO V520 | All versions |
CPE
Remediation
| |
| AMD Radeon PRO V620 | All versions |
CPE
Remediation
| |
| AMD Radeon PRO V710 | All versions |
CPE
Remediation
| |
| AMD Radeon PRO W5000 | All versions |
CPE
Remediation
| |
| AMD Radeon PRO W6000 | All versions |
CPE
Remediation
| |
| AMD Radeon PRO W7000 | All versions |
CPE
Remediation
| |
| AMD Radeon PRO VII | All versions |
CPE
Remediation
| |
| AMD Radeon RX 9000 | All versions |
CPE
Remediation
| |
| AMD Radeon AI PRO 9000 | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 10, 2026 | New CVE Received | [email protected] |