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CVE-2022-43945

Quick assessment

Affected
linux linux_kernel
Exploitation
High exploitation probability; assess promptly
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 NFSD 5.19.17版本、6.0.2版本存在安全漏洞，该漏洞源于容易发生缓冲区溢出。

AI Predicted 7.8 Difficulty: Moderate EPSS 22.29% · P98

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
linux linux_kernel < 6.0.2 affected
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I. Basic Information for CVE-2022-43945

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区大小计算不正确
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 NFSD 5.19.17版本、6.0.2版本存在安全漏洞，该漏洞源于容易发生缓冲区溢出。
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 linux_kernel < 6.0.2 -

II. Public POCs for CVE-2022-43945

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III. Intelligence Information for CVE-2022-43945

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Patches & Fixes for CVE-2022-43945 (1)

Vendor Advisories for CVE-2022-43945 (1)

IV. Related Vulnerabilities

Same product: linux_kernel
Same vendor: linux
Same weakness: CWE-131

V. Comments for CVE-2022-43945

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