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CVE-2023-52923— netfilter: nf_tables: adapt set backend to use GC transaction API

Quick assessment

Affected
Linux Linux
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netfilter模块中nf_tables的垃圾回收机制存在缺陷。

CVSS 7.8 · High EPSS 0.26% · P18

Possible ATT&CK Techniques 2 AI

T1562.001 T1053.003 · Cron

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 9d0982927e79049675cb6c6c04a0ebb3dad5a434< cb4d00b563675ba8ff6ef94b077f58d816f68ba3 affected
9d0982927e79049675cb6c6c04a0ebb3dad5a434< c357648929c8dff891502349769aafb8f0452bc2 affected
9d0982927e79049675cb6c6c04a0ebb3dad5a434< 146c76866795553dbc19998f36718d7986ad302b affected
9d0982927e79049675cb6c6c04a0ebb3dad5a434< 479a2cf5259347d6a1f658b0f791d27a34908e91 affected
9d0982927e79049675cb6c6c04a0ebb3dad5a434< df650d6a4bf47248261b61ef6b174d7c54034d15 affected
9d0982927e79049675cb6c6c04a0ebb3dad5a434< e4d71d6a9c7db93f7bf20c3a0f0659d63d7de681 affected
9d0982927e79049675cb6c6c04a0ebb3dad5a434< f6c383b8c31a93752a52697f8430a71dcbc46adf affected
4.1 affected
… +8 more rows
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I. Basic Information for CVE-2023-52923

Vulnerability Information
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Vulnerability Title
netfilter: nf_tables: adapt set backend to use GC transaction API
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: adapt set backend to use GC transaction API Use the GC transaction API to replace the old and buggy gc API and the busy mark approach. No set elements are removed from async garbage collection anymore, instead the _DEAD bit is set on so the set element is not visible from lookup path anymore. Async GC enqueues transaction work that might be aborted and retried later. rbtree and pipapo set backends does not set on the _DEAD bit from the sync GC path since this runs in control plane path where mutex is held. In this case, set elements are deactivated, removed and then released via RCU callback, sync GC never fails.
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
N/A
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存在安全漏洞，该漏洞源于netfilter模块中nf_tables的垃圾回收机制存在缺陷。
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 9d0982927e79049675cb6c6c04a0ebb3dad5a434 ~ cb4d00b563675ba8ff6ef94b077f58d816f68ba3 -
Linux Linux 4.1 -

II. Public POCs for CVE-2023-52923

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III. Intelligence Information for CVE-2023-52923

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Patches & Fixes for CVE-2023-52923 (7)

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-52923

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