Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

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

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。

CVSS 7.8 · High EPSS 0.16% · P5

Affected Version Matrix 28

VendorProduct Version RangeStatus
Linux Linux 427215d85e8d1476da1a86b8d67aceb485eb3631< 36fecd740de2d542d2091d65d36554ee2bcf9c65 affected
427215d85e8d1476da1a86b8d67aceb485eb3631< d717325b5ecf2a40daca85c61923e17f32306179 affected
427215d85e8d1476da1a86b8d67aceb485eb3631< dc6a664089f10eab0fb36b6e4f705022210191d2 affected
427215d85e8d1476da1a86b8d67aceb485eb3631< e77078e52fbf018ab986efb3c79065ab35025607 affected
427215d85e8d1476da1a86b8d67aceb485eb3631< 38628ae06e2a37770cd794802a3f1310cf9846e3 affected
427215d85e8d1476da1a86b8d67aceb485eb3631< c28f922c9dcee0e4876a2c095939d77fe7e15116 affected
c6e8810d25295acb40a7b69ed3962ff181919571 affected
e3eee87c846dc47f6d8eb6d85e7271f24122a279 affected
… +20 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2025-38499

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 427215d85e8d1476da1a86b8d67aceb485eb3631 ~ 36fecd740de2d542d2091d65d36554ee2bcf9c65 -
Linux Linux 5.14 -

II. Public POCs for CVE-2025-38499

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2025-38499

请登录查看更多情报信息。

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38499

No comments yet

Leave a comment