CVE-2021-46747
AMD Secure Processor: Privilege Escalation via SMN Aperture Mapping
Description
Insufficient granularity of access control in ASP (AMD Secure Processor) may allow an attacker with an untrusted user space application to map sensitive SMN (System Management Network) apertures leading to a potential escalation of privileges.
INFO
Published Date :
June 1, 2026, 9:16 p.m.
Last Modified :
July 22, 2026, 8:10 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2021-46747
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | b58fc414-a1e4-4f92-9d70-1add41838648 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Apply firmware updates for AMD Secure Processor.
- Verify access controls for SMN apertures.
- Restrict access to trusted applications only.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-46747.
| URL | Resource |
|---|---|
| https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4017.html | |
| https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6027.html |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-46747 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-46747
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-46747 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-46747 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 22, 2026
Action Type Old Value New Value Added Translation Title: varios productos de AMD, Description: Granularidad insuficiente de control de acceso en ASP (AMD Secure Processor) puede permitir a un atacante con una aplicación de espacio de usuario no confiable mapear aperturas SMN (System Management Network) sensibles, lo que lleva a una posible escalada de privilegios. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'AMD', 'product': 'AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics', 'versions': [{'status': 'unaffected', 'version': 'PicassoPI-FP5 1.0.0.E'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors', 'versions': [{'status': 'unaffected', 'version': 'CastlePeakWSPI-sWRX8 1.0.0.9'}, {'status': 'unaffected', 'version': 'ChagallWSPI-sWRX8 1.0.0.2'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics', 'versions': [{'status': 'unaffected', 'version': 'ComboAM4v2 PI 1.2.0.6'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors', 'versions': [{'status': 'unaffected', 'version': 'ChagallWSPI-sWRX8 1.0.0.1'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics', 'versions': [{'status': 'unaffected', 'version': 'RenoirPI-FP6 1.0.0.8'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics', 'versions': [{'status': 'unaffected', 'version': 'PicassoPI-FP5 1.0.0.E'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics', 'versions': [{'status': 'unaffected', 'version': 'CezannePI-FP6 1.0.0.9'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ 3000 Series Desktop Processors', 'versions': [{'status': 'unaffected', 'version': 'ComboAM4PI 1.0.0.9/ComboAM4 V2 PI 1.2.0.8'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics', 'versions': [{'status': 'unaffected', 'version': 'ComboAM4v2 PI 1.2.0.8'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics', 'versions': [{'status': 'unaffected', 'version': 'CezannePI-FP6 1.0.0.9'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ 4000 Series Desktop Processors', 'versions': [{'status': 'unaffected', 'version': 'ComboAM4v2 PI 1.2.0.6'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ 5000 Series Desktop Processors', 'versions': [{'status': 'unaffected', 'version': 'ComboAM4 V2 PI 1.2.0.8'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ Embedded R1000 Series Processors', 'versions': [{'status': 'unaffected', 'version': 'EmbeddedPI-FP5_1.2.0.A'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ Embedded R2000 Series Processors', 'versions': [{'status': 'unaffected', 'version': 'EmbeddedPI-FP5_1002'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ Embedded 5000 Series Processors', 'versions': [{'status': 'unaffected', 'version': 'EmbAM4PI 1.0.0.2'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ Embedded V1000 Series Processors (formerly codenamed "Raven Ridge")', 'versions': [{'status': 'unaffected', 'version': 'EmbeddedPI-FP5_1.2.0.A'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ Embedded V1000 Series Processors (formerly codenamed "Picasso")', 'versions': [{'status': 'unaffected', 'version': 'EmbeddedPI-FP5_1.2.0.A'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ Embedded V2000 Series Processors', 'versions': [{'status': 'unaffected', 'version': 'EmbeddedPI-FP6_1.0.0.6'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Ryzen™ Embedded V3000 Series Processors', 'versions': [{'status': 'unaffected', 'version': 'EmbeddedPI-FP7r2_0080'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Radeon™ RX 5000 Series Graphics Products', 'versions': [{'status': 'unaffected', 'version': 'AMD Software: Adrenalin Edition 25.11.1 (25.10.33.03)'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Radeon™ PRO W5000 Series Graphics Products', 'versions': [{'status': 'unaffected', 'version': 'AMD Software: PRO Edition 25.Q3.1 (25.10.32)'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Radeon™ RX 6000 Series Graphics Products', 'versions': [{'status': 'unaffected', 'version': 'AMD Software: Adrenalin Edition 25.11.1 (25.10.33.03)'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Radeon™ RX 7000 Series Graphics Products', 'versions': [{'status': 'unaffected', 'version': 'AMD Software: Adrenalin Edition 25.11.1 (25.10.33.03)'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Radeon™ PRO W6000 Series Graphics Products', 'versions': [{'status': 'unaffected', 'version': 'AMD Software: PRO Edition 25.Q3.1 (25.10.32)'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Radeon™ PRO W7000 Series Graphics Products', 'versions': [{'status': 'unaffected', 'version': 'AMD Software: PRO Edition 25.Q3.1 (25.10.32)'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Radeon™ PRO V520', 'versions': [{'status': 'unaffected', 'version': 'Contact your AMD Customer Engineering representative'}], 'defaultStatus': 'affected'}, {'vendor': 'AMD', 'product': 'AMD Radeon™ PRO V620', 'versions': [{'status': 'unaffected', 'version': 'Contact your AMD Customer Engineering representative'}], 'defaultStatus': 'affected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2021-46747', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-02T03:56:08.958235Z'} -
New CVE Received by [email protected]
Jun. 01, 2026
Action Type Old Value New Value Added Description Insufficient granularity of access control in ASP (AMD Secure Processor) may allow an attacker with an untrusted user space application to map sensitive SMN (System Management Network) apertures leading to a potential escalation of privileges. Added CVSS V4.0 AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-1220 Added Reference https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4017.html Added Reference https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6027.html