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CVE-2023-0266— Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel

Quick assessment

Affected
Linux Linux Kernel
Exploitation
Confirmed exploitation in the wild; remediate immediately
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，该漏洞源于内存释放后重用，从而导致权限升级。

CVSS 7.9 · High KEV EPSS 3.70% · P89

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2023-0266

Vulnerability Information
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Vulnerability Title
Use after free in SNDRV_CTL_IOCTL_ELEM in Linux Kernel
Source: CVE Program / CVE List V5
Vulnerability Description
A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. We recommend upgrading past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:L/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存在资源管理错误漏洞，该漏洞源于内存释放后重用，从而导致权限升级。
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)

Shenlong Deep Dive — AI Deep Analysis

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux Kernel 4.14 ~ 56b88b50565cd8b946a2d00b0c83927b7ebb055e -

II. Public POCs for CVE-2023-0266

# POC Description Source Link Shenlong Link
1 Demo showing Claude Opus does not find CVE-2023-0266 https://github.com/SeanHeelan/claude_opus_cve_2023_0266 POC Details
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III. Intelligence Information for CVE-2023-0266

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Patches & Fixes for CVE-2023-0266 (3)

Mailing List Discussions for CVE-2023-0266 (1)

IV. Related Vulnerabilities

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

V. Comments for CVE-2023-0266

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