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CVE-2021-3501

Quick assessment

Affected
Linux kernel
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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。KVM是其中的一个基于内核的虚拟机。 Linux内核5.12之前版本存在缓冲区错误漏洞。该漏洞这可能导致越界写入。

AI Predicted 8.8 Difficulty: Moderate EPSS 0.37% · P31

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 2

VendorProduct Version RangeStatus
Linux kernel 5.9< 5.10.32 affected
5.11< 5.11.16 affected
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I. Basic Information for CVE-2021-3501

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the Linux kernel in versions before 5.12. The value of internal.ndata, in the KVM API, is mapped to an array index, which can be updated by a user process at anytime which could lead to an out-of-bounds write. The highest threat from this vulnerability is to data integrity and system availability.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。KVM是其中的一个基于内核的虚拟机。 Linux内核5.12之前版本存在缓冲区错误漏洞。该漏洞这可能导致越界写入。
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
Linux kernel 5.9 ~ 5.10.32 -

II. Public POCs for CVE-2021-3501

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III. Intelligence Information for CVE-2021-3501

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Patches & Fixes for CVE-2021-3501 (1)

Vendor Advisories for CVE-2021-3501 (2)

IV. Related Vulnerabilities

Same product: kernel
Same vendor: Linux
Same weakness: CWE-787

V. Comments for CVE-2021-3501

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