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CVE-2021-3739

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 存在安全漏洞，该漏洞源于Linux kernel 的 btrfs_rm_device() 强制取消引用 NULL 指针，以触发拒绝服务。

AI Predicted 4.7 Difficulty: Easy EPSS 0.62% · P50

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2021-3739

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A NULL pointer dereference flaw was found in the btrfs_rm_device function in fs/btrfs/volumes.c in the Linux Kernel, where triggering the bug requires ‘CAP_SYS_ADMIN’. This flaw allows a local attacker to crash the system or leak kernel internal information. The highest threat from this vulnerability is to system availability.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 代码问题漏洞
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Linux kernel 的 btrfs_rm_device() 强制取消引用 NULL 指针，以触发拒绝服务。
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
- kernel Fixed in v5.15-rc1 and above. -

II. Public POCs for CVE-2021-3739

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III. Intelligence Information for CVE-2021-3739

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Patches & Fixes for CVE-2021-3739 (2)

Vendor Advisories for CVE-2021-3739 (3)

Mailing List Discussions for CVE-2021-3739 (1)

Same Patch Batch · n/a · 2022-03-07 · 46 CVEs total

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CVE-2021-41657 SmartBear CodeCollaborator 输入验证错误漏洞
CVE-2021-43970 Quicklert 代码问题漏洞
CVE-2021-43969 Quicklert SQL注入漏洞
CVE-2022-22834 OverIT Geocall 安全漏洞
CVE-2022-22835 OverIT Geocall 代码问题漏洞

Showing top 20 of 46 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: kernel
Same vendor: n/a
Same weakness: CWE-476