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CVE-2025-71239— audit: add fchmodat2() to change attributes class

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fchmodat2函数未纳入审计变更属性类，可能导致绕过审计规则。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1564.008 · Email Hiding Rules

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 09da082b07bbae1c11d9560c8502800039aebcea< 91e27bc79c3bca93c06bf5a471d47df9a35b3741 affected
09da082b07bbae1c11d9560c8502800039aebcea< 3e762a03713e8c25ca0108c075d662c897fc0623 affected
09da082b07bbae1c11d9560c8502800039aebcea< 4fed776ca86378da7dd743a7b648e20b025ba8ef affected
09da082b07bbae1c11d9560c8502800039aebcea< c4334c0d0e7d6f02ed93756fd4ba807e3d00c05f affected
09da082b07bbae1c11d9560c8502800039aebcea< 4f493a6079b588cf1f04ce5ed6cdad45ab0d53dc affected
6.6 affected
< 6.6 unaffected
6.6.128≤ 6.6.* unaffected
… +4 more rows
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I. Basic Information for CVE-2025-71239

Vulnerability Information
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Vulnerability Title
audit: add fchmodat2() to change attributes class
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: audit: add fchmodat2() to change attributes class fchmodat2(), introduced in version 6.6 is currently not in the change attribute class of audit. Calling fchmodat2() to change a file attribute in the same fashion than chmod() or fchmodat() will bypass audit rules such as: -w /tmp/test -p rwa -k test_rwa The current patch adds fchmodat2() to the change attributes class.
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fchmodat2函数未纳入审计变更属性类，可能导致绕过审计规则。
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 09da082b07bbae1c11d9560c8502800039aebcea ~ 91e27bc79c3bca93c06bf5a471d47df9a35b3741 -
Linux Linux 6.6 -

II. Public POCs for CVE-2025-71239

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III. Intelligence Information for CVE-2025-71239

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Patches & Fixes for CVE-2025-71239 (8)

Security Blog Posts for CVE-2025-71239 (1)

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-71239

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