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CVE-2021-3679

Quick assessment

Affected
n/a kernel
Exploitation
Public or AI PoC available; prioritize validation
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。 Linux kernel 存在安全漏洞，该漏洞源于在5.14-rc3之前版本的Linux内核跟踪模块功能中，用户以特定方式使用跟踪环缓冲区时发现CPU资源不足。攻击者可利用该漏洞导致服务被拒绝。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.75% · P53

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-3679

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 资源管理错误漏洞
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。 Linux kernel 存在安全漏洞，该漏洞源于在5.14-rc3之前版本的Linux内核跟踪模块功能中，用户以特定方式使用跟踪环缓冲区时发现CPU资源不足。攻击者可利用该漏洞导致服务被拒绝。
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
- kernel kernel 5.14-rc3 -

II. Public POCs for CVE-2021-3679

# POC Description Source Link Shenlong Link
1 Exploitation for CVE-2021-3679 and document for its fix https://github.com/aegistudio/RingBufferDetonator POC Details
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III. Intelligence Information for CVE-2021-3679

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Patches & Fixes for CVE-2021-3679 (1)

Vendor Advisories for CVE-2021-3679 (2)

Mailing List Discussions for CVE-2021-3679 (2)

Same Patch Batch · n/a · 2021-08-05 · 54 CVEs total

CVE-2021-22920 Citrix Application Delivery Controller安全漏洞
CVE-2021-3655 Linux kernel 输入验证错误漏洞
CVE-2021-35325 TotoLink A720R 缓冲区错误漏洞
CVE-2021-20592 Mitsubishi Electric GOT2000 安全漏洞
CVE-2021-22517 Micro Focus Data Protector 安全漏洞
CVE-2021-26586 HPE Edgeline Infrastructure Management 安全漏洞
CVE-2021-3642 Red Hat Wildfly Elytron 安全漏洞
CVE-2021-1630 MuleSoft Mule 代码问题漏洞
CVE-2021-3566 FFmpeg 信息泄露漏洞
CVE-2021-22924 libcurl 资源管理错误漏洞
CVE-2021-37156 Redmine 代码问题漏洞
CVE-2021-22919 Citrix ADC and NetScaler Gateway安全漏洞
CVE-2021-22927 Citrix Application Delivery Controller授权问题漏洞
CVE-2021-22928 Citrix Systems Citrix Virtual Apps and Desktops 安全漏洞
CVE-2021-21893 Foxit PDF Reader和Foxit PDF Editor 资源管理错误漏洞
CVE-2021-21831 Foxit PDF Reader和Foxit PDF Editor 资源管理错误漏洞
CVE-2021-21870 Foxit PDF Reader和Foxit PDF Editor 资源管理错误漏洞
CVE-2021-21785 IOBit Advanced SystemCare 安全漏洞
CVE-2021-21792 IOBit Advanced SystemCare 安全漏洞
CVE-2021-21791 IOBit Advanced SystemCare 安全漏洞

Showing top 20 of 54 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: kernel
Same vendor: n/a
Same weakness: CWE-400

V. Comments for CVE-2021-3679

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