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CVE-2023-2008— Kernel: udmabuf: improper validation of array index leading to local privilege escalation

Quick assessment

Affected
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存在安全漏洞，该漏洞源于缺乏对用户提供的数据的正确验证，这可能导致内存访问超出数组末尾。攻击者可以利用此漏洞可以提升权限并在内核上下文中执行任意代码。

CVSS 8.2 · High EPSS 1.01% · P62

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux kernel 4.20< 5.4.202 affected
5.5< 5.10.127 affected
5.11< 5.15.51 affected
5.16< 5.18.8 affected
5.19 unaffected
Red Hat Red Hat Enterprise Linux 6 any unaffected
Red Hat Red Hat Enterprise Linux 7 any unaffected
any unaffected
Red Hat Red Hat Enterprise Linux 8 any unaffected
any unaffected
Red Hat Red Hat Enterprise Linux 9 0:5.14.0-162.6.1.el9_1< * unaffected
0:5.14.0-162.6.1.rt21.168.el9_1< * unaffected
0:5.14.0-162.6.1.el9_1< * unaffected
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 0:5.14.0-70.58.1.el9_0< * unaffected
0:5.14.0-70.58.1.rt21.129.el9_0< * unaffected
any unaffected
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I. Basic Information for CVE-2023-2008

Vulnerability Information
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Vulnerability Title
Kernel: udmabuf: improper validation of array index leading to local privilege escalation
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the Linux kernel's udmabuf device driver, within a fault handler. This issue occurs due to the lack of proper validation of user-supplied data, which can result in memory access past the end of an array. This may allow an attacker to escalate privileges and execute arbitrary code in the context of the kernel.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对数组索引的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 输入验证错误漏洞
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，该漏洞源于缺乏对用户提供的数据的正确验证，这可能导致内存访问超出数组末尾。攻击者可以利用此漏洞可以提升权限并在内核上下文中执行任意代码。
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 kernel 4.20 ~ 5.4.202 -
Red Hat Red Hat Enterprise Linux 9 0:5.14.0-162.6.1.el9_1 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 0:5.14.0-162.6.1.rt21.168.el9_1 ~ * cpe:/a:redhat:enterprise_linux:9::nfv
Red Hat Red Hat Enterprise Linux 9 0:5.14.0-162.6.1.el9_1 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 0:5.14.0-70.58.1.el9_0 ~ * cpe:/a:redhat:rhel_eus:9.0::appstream
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 0:5.14.0-70.58.1.rt21.129.el9_0 ~ * cpe:/a:redhat:rhel_eus:9.0::nfv
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support - cpe:/o:redhat:rhel_eus:9.0::baseos
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8

II. Public POCs for CVE-2023-2008

# POC Description Source Link Shenlong Link
1 Proof of concept code for CVE-2023-2008 https://github.com/bluefrostsecurity/CVE-2023-2008 POC Details
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III. Intelligence Information for CVE-2023-2008

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Patches & Fixes for CVE-2023-2008 (1)

Vendor Advisories for CVE-2023-2008 (9)

IV. Related Vulnerabilities

Same product: kernel
Same vendor: Linux
Same weakness: CWE-129

V. Comments for CVE-2023-2008

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