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CVE-2023-0461— Use-after-free vulnerability in the Linux Kernel

Quick assessment

Affected
Linux Linux Kernel
Exploitation
Public or AI PoC available; prioritize validation
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存在资源管理错误漏洞，该漏洞源于Linux kernel中的上层协议 (ULP) 子系统没有正确处理某些协议中进入 LISTEN 状态的套接字，导致释放后重用，攻击者利用该漏洞可以导致拒绝服务（系统崩溃）或执行任意代码。

CVSS 7.8 · High EPSS 0.65% · P49
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I. Basic Information for CVE-2023-0461

Vulnerability Information
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Vulnerability Title
Use-after-free vulnerability in the Linux Kernel
Source: CVE Program / CVE List V5
Vulnerability Description
There is a use-after-free vulnerability in the Linux Kernel which can be exploited to achieve local privilege escalation. To reach the vulnerability kernel configuration flag CONFIG_TLS or CONFIG_XFRM_ESPINTCP has to be configured, but the operation does not require any privilege. There is a use-after-free bug of icsk_ulp_data of a struct inet_connection_sock. When CONFIG_TLS is enabled, user can install a tls context (struct tls_context) on a connected tcp socket. The context is not cleared if this socket is disconnected and reused as a listener. If a new socket is created from the listener, the context is inherited and vulnerable. The setsockopt TCP_ULP operation does not require any privilege. We recommend upgrading past commit 2c02d41d71f90a5168391b6a5f2954112ba2307c
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 品资源管理错误漏洞
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存在资源管理错误漏洞，该漏洞源于Linux kernel中的上层协议 (ULP) 子系统没有正确处理某些协议中进入 LISTEN 状态的套接字，导致释放后重用，攻击者利用该漏洞可以导致拒绝服务（系统崩溃）或执行任意代码。
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 0 ~ 2c02d41d71f90a5168391b6a5f2954112ba2307c -

II. Public POCs for CVE-2023-0461

# POC Description Source Link Shenlong Link
1 None https://github.com/hshivhare67/kernel_v4.19.72_CVE-2023-0461 POC Details
2 None https://github.com/b1nhack/CVE-2023-0461 POC Details
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III. Intelligence Information for CVE-2023-0461

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Patches & Fixes for CVE-2023-0461 (1)

Mailing List Discussions for CVE-2023-0461 (2)

Other References for CVE-2023-0461 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2023-0461

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