CVE-2021-26355
Quick assessment
Affected
AMD 3rd Gen EPYC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
AMD System Management Unit（SMU）是美国超威半导体（AMD）公司的一个系统管理单元。 AMD System Management Unit (SMU)存在安全漏洞，该漏洞源于防护和检查不足，导致访问无效的消息端口寄存器，从而可能导致拒绝服务。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-26355
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in a potential denial-of-service.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
AMD System Management Unit (SMU) 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
AMD System Management Unit（SMU）是美国超威半导体（AMD）公司的一个系统管理单元。 AMD System Management Unit (SMU)存在安全漏洞，该漏洞源于防护和检查不足，导致访问无效的消息端口寄存器，从而可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| AMD | 3rd Gen EPYC | various | - |
|
II. Public POCs for CVE-2021-26355
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-26355 (1)
Same Patch Batch · AMD · 2023-01-10 · 14 CVEs total
| CVE-2023-20530 | AMD System Management Unit(SMU) 输入验证错误漏洞 | |
| CVE-2023-20527 | AMD Secure Processor(ASP) 输入验证错误漏洞 | |
| CVE-2022-23814 | 多款AMD产品 输入验证错误漏洞 | |
| CVE-2021-46791 | AMD System Management Mode 缓冲区错误漏洞 | |
| CVE-2021-46779 | AMD Secure Processor 缓冲区错误漏洞 | |
| CVE-2021-26409 | AMD Secure Encrypted Virtualization 安全漏洞 | |
| CVE-2021-26404 | AMD Secure Encrypted Virtualization (SEV) 输入验证错误漏洞 | |
| CVE-2021-26403 | AMD Secure Encrypted Virtualization (SEV) 安全漏洞 | |
| CVE-2021-26402 | AMD Secure Processor 缓冲区错误漏洞 | |
| CVE-2021-26398 | AMD Secure Processor 缓冲区错误漏洞 | |
| CVE-2021-26396 | AMD Secure Processor 数据伪造问题漏洞 | |
| CVE-2021-26343 | AMD Secure Processor 安全漏洞 | |
| CVE-2021-26328 | AMD Secure Processor 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2021-26355
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