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CVE-2023-2612— shiftfs lock unbalance in Ubuntu-specific kernels

Quick assessment

Affected
Canonical Ltd. ubuntu-linux
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.

Canonical Ubuntu是英国科能软件（Canonical）公司的一套以桌面应用为主的GNU/Linux操作系统。 Canonical Ubuntu Linux kernel（OEM）存在安全漏洞。攻击者利用该漏洞导致系统拒绝服务。

CVSS 4.4 · Medium EPSS 0.28% · P19
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I. Basic Information for CVE-2023-2612

Vulnerability Information
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Vulnerability Title
shiftfs lock unbalance in Ubuntu-specific kernels
Source: CVE Program / CVE List V5
Vulnerability Description
Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux kernel contained a race condition when handling inode locking in some situations. A local attacker could use this to cause a denial of service (kernel deadlock).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
加锁机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Canonical Ubuntu 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Canonical Ubuntu是英国科能软件（Canonical）公司的一套以桌面应用为主的GNU/Linux操作系统。 Canonical Ubuntu Linux kernel（OEM）存在安全漏洞。攻击者利用该漏洞导致系统拒绝服务。
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
Canonical Ltd. ubuntu-linux 0 ~ 02b47547824b1cd0d55c6744f91886f04de8947e -

II. Public POCs for CVE-2023-2612

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III. Intelligence Information for CVE-2023-2612

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Vendor Advisories for CVE-2023-2612 (5)

Exploits & Public PoCs for CVE-2023-2612 (1)

Other References for CVE-2023-2612 (1)

IV. Related Vulnerabilities

Same vendor: Canonical Ltd.
Same weakness: CWE-667

V. Comments for CVE-2023-2612

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