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CVE-2023-0459— Copy_from_user Spectre-V1 Gadget in Linux Kernel

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，该漏洞源于在 CPU 未实现 SMAP 或禁用 SMAP 的情况下，本地用户可以利用此漏洞从内核中泄露敏感信息。

CVSS 6.5 · Medium EPSS 0.64% · P49
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I. Basic Information for CVE-2023-0459

Vulnerability Information
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Vulnerability Title
Copy_from_user Spectre-V1 Gadget in Linux Kernel
Source: CVE Program / CVE List V5
Vulnerability Description
Copy_from_user on 64-bit versions of the Linux kernel does not implement the __uaccess_begin_nospec allowing a user to bypass the "access_ok" check and pass a kernel pointer to copy_from_user(). This would allow an attacker to leak information. We recommend upgrading beyond commit 74e19ef0ff8061ef55957c3abd71614ef0f42f47
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对无效指针或索引的释放
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，该漏洞源于在 CPU 未实现 SMAP 或禁用 SMAP 的情况下，本地用户可以利用此漏洞从内核中泄露敏感信息。
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 4b842e4e25b12951fa10dedb4bc16bc47e3b850c ~ 74e19ef0ff8061ef55957c3abd71614ef0f42f47 -

II. Public POCs for CVE-2023-0459

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III. Intelligence Information for CVE-2023-0459

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Patches & Fixes for CVE-2023-0459 (2)

IV. Related Vulnerabilities

Same product: Linux Kernel
Same vendor: Linux
Same weakness: CWE-763

V. Comments for CVE-2023-0459

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