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CVE-2024-14027— xattr: switch to CLASS(fd)

Quick assessment

Affected
Linux 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.

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fremovexattr错误路径中缺少fdput调用，可能导致本地用户造成内核内存耗尽。

AI Predicted 5.5 Difficulty: Easy EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 11

VendorProduct Version RangeStatus
Linux Linux c03185f4a23e7f89d84c9981091770e876e64480< 9a3a2ae5efbbcaed37551218abed94e23c537157 affected
c3a5e3e872f3688ae0dc57bb78ca633921d96a91< d151b94967c8247005435b63fc60f8f4baa320da affected
c3a5e3e872f3688ae0dc57bb78ca633921d96a91< a71874379ec8c6e788a61d71b3ad014a8d9a5c08 affected
8d5863cb33aa424fc27115ee945ad6b96ae2facb affected
6.6.51< 6.6.133 affected
6.10.10< 6.11 affected
6.11 affected
< 6.11 unaffected
… +3 more rows
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I. Basic Information for CVE-2024-14027

Vulnerability Information
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Vulnerability Title
xattr: switch to CLASS(fd)
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fs/xattr: missing fdput() in fremovexattr error path In the Linux kernel, the fremovexattr() syscall calls fdget() to acquire a file reference but returns early without calling fdput() when strncpy_from_user() fails on the name argument. In multi-threaded processes where fdget() takes the slow path, this permanently leaks one file reference per call, pinning the struct file and associated kernel objects in memory. An unprivileged local user can exploit this to cause kernel memory exhaustion. The issue was inadvertently fixed by commit a71874379ec8 ("xattr: switch to CLASS(fd)").
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
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fremovexattr错误路径中缺少fdput调用，可能导致本地用户造成内核内存耗尽。
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 c03185f4a23e7f89d84c9981091770e876e64480 ~ 9a3a2ae5efbbcaed37551218abed94e23c537157 -
Linux Linux 6.11 -

II. Public POCs for CVE-2024-14027

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III. Intelligence Information for CVE-2024-14027

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Patches & Fixes for CVE-2024-14027 (2)

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-14027

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