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CVE-2021-4023

Quick assessment

Affected
n/a 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。 Linux kernel 5.15-rc1之前版本中的io-workqueue存在安全漏洞，该漏洞源于不正确的取消操作触发了提交新的io-uring，从而导致内核错误。攻击者利用该漏洞（具有执行 io-uring 请求权限的本地用户）导致系统崩溃。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.24% · P15
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I. Basic Information for CVE-2021-4023

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the io-workqueue implementation in the Linux kernel versions prior to 5.15-rc1. The kernel can panic when an improper cancellation operation triggers the submission of new io-uring operations during a shortage of free space. This flaw allows a local user with permissions to execute io-uring requests to possibly crash the system.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
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 5.15-rc1之前版本中的io-workqueue存在安全漏洞，该漏洞源于不正确的取消操作触发了提交新的io-uring，从而导致内核错误。攻击者利用该漏洞（具有执行 io-uring 请求权限的本地用户）导致系统崩溃。
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 versions prior to 5.15-rc1 -

II. Public POCs for CVE-2021-4023

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III. Intelligence Information for CVE-2021-4023

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Vendor Advisories for CVE-2021-4023 (1)

Same Patch Batch · n/a · 2022-03-09 · 50 CVEs total

CVE-2022-24960 6.5 MEDIUM Use after free vulnerability in PDFTron SDK
CVE-2022-26778 5.3 MEDIUM Veritas System Recovery安全漏洞
CVE-2022-0204 BlueZ 输入验证错误漏洞
CVE-2022-25552 Tenda AX1806 缓冲区错误漏洞
CVE-2021-44631 TP-Link WR886N 安全漏洞
CVE-2021-44627 TP-LINK WR-886N 安全漏洞
CVE-2021-44629 TP-LINK WR-886N 安全漏洞
CVE-2021-44628 TP-Link WR886N 安全漏洞
CVE-2021-44630 TP-Link WR886N 安全漏洞
CVE-2022-25566 Tenda AX1806 缓冲区错误漏洞
CVE-2022-25561 Tenda AX12 缓冲区错误漏洞
CVE-2022-25560 Tenda AX12 缓冲区错误漏洞
CVE-2022-25558 Tenda AX1806 缓冲区错误漏洞
CVE-2022-25557 Tenda AX1806 缓冲区错误漏洞
CVE-2022-25556 Tenda AX12 缓冲区错误漏洞
CVE-2022-25555 Tenda AX1806 缓冲区错误漏洞
CVE-2022-25547 Tenda AX1806 缓冲区错误漏洞
CVE-2022-25554 Tenda AX1806 缓冲区错误漏洞
CVE-2022-25553 Tenda AX1806 缓冲区错误漏洞
CVE-2021-44632 TP-Link WR886N 安全漏洞

Showing top 20 of 50 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: kernel
Same vendor: n/a
Same weakness: CWE-200

V. Comments for CVE-2021-4023

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