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CVE-2025-38499— clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns

EPSS 0.03% · P7

Affected Version Matrix 21

VendorProductVersion RangeStatus
LinuxLinux427215d85e8d1476da1a86b8d67aceb485eb3631< 36fecd740de2d542d2091d65d36554ee2bcf9c65affected
427215d85e8d1476da1a86b8d67aceb485eb3631< d717325b5ecf2a40daca85c61923e17f32306179affected
427215d85e8d1476da1a86b8d67aceb485eb3631< dc6a664089f10eab0fb36b6e4f705022210191d2affected
427215d85e8d1476da1a86b8d67aceb485eb3631< e77078e52fbf018ab986efb3c79065ab35025607affected
427215d85e8d1476da1a86b8d67aceb485eb3631< 38628ae06e2a37770cd794802a3f1310cf9846e3affected
427215d85e8d1476da1a86b8d67aceb485eb3631< c28f922c9dcee0e4876a2c095939d77fe7e15116affected
c6e8810d25295acb40a7b69ed3962ff181919571affected
e3eee87c846dc47f6d8eb6d85e7271f24122a279affected
… +13 more rows
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I. Basic Information for CVE-2025-38499

Vulnerability Information
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Vulnerability Title
clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns What we want is to verify there is that clone won't expose something hidden by a mount we wouldn't be able to undo. "Wouldn't be able to undo" may be a result of MNT_LOCKED on a child, but it may also come from lacking admin rights in the userns of the namespace mount belongs to. clone_private_mnt() checks the former, but not the latter. There's a number of rather confusing CAP_SYS_ADMIN checks in various userns during the mount, especially with the new mount API; they serve different purposes and in case of clone_private_mnt() they usually, but not always end up covering the missing check mentioned above.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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clone_private_mnt未验证用户命名空间中的CAP_SYS_ADMIN权限，可能导致权限提升。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 427215d85e8d1476da1a86b8d67aceb485eb3631 ~ 36fecd740de2d542d2091d65d36554ee2bcf9c65 -
LinuxLinux 5.14 -

II. Public POCs for CVE-2025-38499

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III. Intelligence Information for CVE-2025-38499

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IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38499

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