CVE-2025-38499

Advisory lineage Upstream: 0 Downstream: 139
Modified
Published: 11 Aug 2025, 16:01
Last modified:23 May 2026, 15:59

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.03% LOW
0% probability +0.01%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

11 Aug 2025, 16:01
Published
Vulnerability first disclosed
23 May 2026, 15:59
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.03%• Percentile: 8%

Affected Systems

  • debian•debian_linux

    11.0

  • linux•linux

    ≥ 427215d85e8d1476da1a86b8d67aceb485eb3631, < 36fecd740de2d542d2091d65d36554ee2bcf9c65 | ≥ 427215d85e8d1476da1a86b8d67aceb485eb3631, < d717325b5ecf2a40daca85c61923e17f32306179 | ≥ 427215d85e8d1476da1a86b8d67aceb485eb3631, < dc6a664089f10eab0fb36b6e4f705022210191d2 | ≥ 427215d85e8d1476da1a86b8d67aceb485eb3631, < e77078e52fbf018ab986efb3c79065ab35025607 | ≥ 427215d85e8d1476da1a86b8d67aceb485eb3631, < 38628ae06e2a37770cd794802a3f1310cf9846e3 | ≥ 427215d85e8d1476da1a86b8d67aceb485eb3631, < c28f922c9dcee0e4876a2c095939d77fe7e15116 | c6e8810d25295acb40a7b69ed3962ff181919571 | e3eee87c846dc47f6d8eb6d85e7271f24122a279 | 517b875dfbf58f0c6c9e32dc90f5cf42d71a42ce | 963d85d630dabe75a3cfde44a006fec3304d07b8 | 812f39ed5b0b7f34868736de3055c92c7c4cf459 | 6a002d48a66076524f67098132538bef17e8445e | 41812f4b84484530057513478c6770590347dc30 | ≥ 4.4.281, < 4.5 | ≥ 4.9.280, < 4.10 | ≥ 4.14.244, < 4.15 | ≥ 4.19.204, < 4.20 | ≥ 5.4.141, < 5.5 | ≥ 5.10.59, < 5.11 | ≥ 5.13.11, < 5.14 | 5.14

  • linux•linux_kernel

    ≥ 4.4.281, < 4.5 | ≥ 4.9.280, < 4.10 | ≥ 4.14.244, < 4.15 | ≥ 4.19.204, < 4.20 | ≥ 5.4.141, < 5.5 | ≥ 5.10.59, < 5.11 | ≥ 5.13.11, < 5.14 | ≥ 5.14.1, < 5.15.190 | ≥ 5.16, < 6.1.147 | ≥ 6.2, < 6.6.100 | ≥ 6.7, < 6.12.40 | ≥ 6.13, < 6.15.3 | 5.14 | 5.14:rc6 | 5.14:rc7

References (8)