clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-38499
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-08-11 16:15:30 UTC
Updated2026-05-12 13:16:51 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 427215d85e8d1476da1a86b8d67aceb485eb3631 36fecd740de2d542d2091d65d36554ee2bcf9c65 git Not specified
CNA Linux Linux affected 427215d85e8d1476da1a86b8d67aceb485eb3631 d717325b5ecf2a40daca85c61923e17f32306179 git Not specified
CNA Linux Linux affected 427215d85e8d1476da1a86b8d67aceb485eb3631 dc6a664089f10eab0fb36b6e4f705022210191d2 git Not specified
CNA Linux Linux affected 427215d85e8d1476da1a86b8d67aceb485eb3631 e77078e52fbf018ab986efb3c79065ab35025607 git Not specified
CNA Linux Linux affected 427215d85e8d1476da1a86b8d67aceb485eb3631 38628ae06e2a37770cd794802a3f1310cf9846e3 git Not specified
CNA Linux Linux affected 427215d85e8d1476da1a86b8d67aceb485eb3631 c28f922c9dcee0e4876a2c095939d77fe7e15116 git Not specified
CNA Linux Linux affected c6e8810d25295acb40a7b69ed3962ff181919571 git Not specified
CNA Linux Linux affected e3eee87c846dc47f6d8eb6d85e7271f24122a279 git Not specified
CNA Linux Linux affected 517b875dfbf58f0c6c9e32dc90f5cf42d71a42ce git Not specified
CNA Linux Linux affected 963d85d630dabe75a3cfde44a006fec3304d07b8 git Not specified
CNA Linux Linux affected 812f39ed5b0b7f34868736de3055c92c7c4cf459 git Not specified
CNA Linux Linux affected 6a002d48a66076524f67098132538bef17e8445e git Not specified
CNA Linux Linux affected 41812f4b84484530057513478c6770590347dc30 git Not specified
CNA Linux Linux affected 5.14 Not specified
CNA Linux Linux unaffected 5.14 semver Not specified
CNA Linux Linux unaffected 5.15.190 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.147 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.100 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.40 6.12.* semver Not specified
CNA Linux Linux unaffected 6.15.3 6.15.* semver Not specified
CNA Linux Linux unaffected 6.16 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.5 * custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.5 * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/36fecd740de2d542d2091d65d36554ee2bcf9c65 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Third Party Advisory
cert-portal.siemens.com/productcert/html/ssa-082556.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/c28f922c9dcee0e4876a2c095939d77fe7e15116 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e77078e52fbf018ab986efb3c79065ab35025607 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d717325b5ecf2a40daca85c61923e17f32306179 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/38628ae06e2a37770cd794802a3f1310cf9846e3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/dc6a664089f10eab0fb36b6e4f705022210191d2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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