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CVE-2021-26340

Quick assessment

Affected
AMD AMD 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 EPYC是美国AMD公司的一款x86架构服务器微处理器产品线，中文名为“霄龙”，采用Zen微架构。 AMD EPYC Embedded Processors 存在安全漏洞，该漏洞源于恶意虚拟机管理程序在VM中执行的非特权进程可能会恶意控制刷新转换后备缓冲区的过程。

AI Predicted 4.4 Difficulty: Hard EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-26340

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A malicious hypervisor in conjunction with an unprivileged attacker process inside an SEV/SEV-ES guest VM may fail to flush the Translation Lookaside Buffer (TLB) resulting in unexpected behavior inside the virtual machine (VM).
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 EPYC Embedded Processors 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
AMD EPYC是美国AMD公司的一款x86架构服务器微处理器产品线，中文名为“霄龙”，采用Zen微架构。 AMD EPYC Embedded Processors 存在安全漏洞，该漏洞源于恶意虚拟机管理程序在VM中执行的非特权进程可能会恶意控制刷新转换后备缓冲区的过程。
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 AMD EPYC™ Processor ~ 3rd gen EPYC -

II. Public POCs for CVE-2021-26340

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III. Intelligence Information for CVE-2021-26340

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Other References for CVE-2021-26340 (1)

IV. Related Vulnerabilities

Same vendor: AMD

V. Comments for CVE-2021-26340

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