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CVE-2023-4244— Use-after-free in Linux kernel's netfilter: nf_tables component

Quick assessment

Affected
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，该漏洞源于内存释放后重用。攻击者利用该漏洞可以提升权限。

CVSS 7.8 · High EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Kernel 0.0< 4.19.316 affected
4.20< 5.4.262 affected
5.5< 5.10.198 affected
5.11< 5.15.134 affected
5.16< 6.1.56 affected
6.2< 6.4.11 affected
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I. Basic Information for CVE-2023-4244

Vulnerability Information
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Vulnerability Title
Use-after-free in Linux kernel's netfilter: nf_tables component
Source: CVE Program / CVE List V5
Vulnerability Description
A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability. We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.
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，该漏洞源于内存释放后重用。攻击者利用该漏洞可以提升权限。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Kernel 0.0 ~ 4.19.316 -

II. Public POCs for CVE-2023-4244

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III. Intelligence Information for CVE-2023-4244

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Patches & Fixes for CVE-2023-4244 (1)

Mailing List Discussions for CVE-2023-4244 (2)

Other References for CVE-2023-4244 (1)

Same Patch Batch · Linux · 2023-09-06 · 8 CVEs total

CVE-2023-4623 7.8 HIGH Use-after-free in Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) componen
CVE-2023-4622 7.8 HIGH Use-after-free in Linux kernel's af_unix component
CVE-2023-4208 7.8 HIGH Use-after-free in Linux kernel's net/sched: cls_u32 component
CVE-2023-4207 7.8 HIGH Use-after-free in Linux kernel's net/sched: cls_fw component
CVE-2023-4206 7.8 HIGH Use-after-free in Linux kernel's net/sched: cls_route component
CVE-2023-4015 7.8 HIGH Use-after-free in Linux kernel's netfilter: nf_tables component
CVE-2023-3777 7.8 HIGH Use-after-free in Linux kernel's netfilter: nf_tables component

IV. Related Vulnerabilities

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

V. Comments for CVE-2023-4244

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