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CVE-2023-31248— Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability

Quick assessment

Affected
Linux 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。 Linux kernel存在安全漏洞，该漏洞源于存在释放后重用漏洞，可以导致本地权限提升。

CVSS 7.8 · High EPSS 2.05% · P81
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I. Basic Information for CVE-2023-31248

Vulnerability Information
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Vulnerability Title
Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
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，该漏洞源于存在释放后重用漏洞，可以导致本地权限提升。
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 v5.9-rc1 -

II. Public POCs for CVE-2023-31248

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III. Intelligence Information for CVE-2023-31248

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Vendor Advisories for CVE-2023-31248 (2)

Exploits & Public PoCs for CVE-2023-31248 (2)

Mailing List Discussions for CVE-2023-31248 (3)

Other References for CVE-2023-31248 (1)

IV. Related Vulnerabilities

Same product: Linux Kernel
Same vendor: Linux
Same weakness: CWE-416

V. Comments for CVE-2023-31248

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