CVE-2025-38499 (GCVE-0-2025-38499)

Vulnerability from cvelistv5 – Published: 2025-08-11 16:01 – Updated: 2025-11-03 17:39
VLAI?
Title
clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < 36fecd740de2d542d2091d65d36554ee2bcf9c65 (git)
Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < d717325b5ecf2a40daca85c61923e17f32306179 (git)
Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < dc6a664089f10eab0fb36b6e4f705022210191d2 (git)
Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < e77078e52fbf018ab986efb3c79065ab35025607 (git)
Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < 38628ae06e2a37770cd794802a3f1310cf9846e3 (git)
Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < c28f922c9dcee0e4876a2c095939d77fe7e15116 (git)
Affected: c6e8810d25295acb40a7b69ed3962ff181919571 (git)
Affected: e3eee87c846dc47f6d8eb6d85e7271f24122a279 (git)
Affected: 517b875dfbf58f0c6c9e32dc90f5cf42d71a42ce (git)
Affected: 963d85d630dabe75a3cfde44a006fec3304d07b8 (git)
Affected: 812f39ed5b0b7f34868736de3055c92c7c4cf459 (git)
Affected: 6a002d48a66076524f67098132538bef17e8445e (git)
Affected: 41812f4b84484530057513478c6770590347dc30 (git)
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    Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.190 , ≤ 5.15.* (semver)
Unaffected: 6.1.147 , ≤ 6.1.* (semver)
Unaffected: 6.6.100 , ≤ 6.6.* (semver)
Unaffected: 6.12.40 , ≤ 6.12.* (semver)
Unaffected: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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