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

Vulnerability from cvelistv5 – Published: 2025-08-11 16:01 – Updated: 2026-05-12 12:05
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)
Create a notification for this product.
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Lo que queremos es verificar que clone no exponga algo oculto por un montaje que no podamos deshacer. \\\"No se puede deshacer\\\" puede ser el resultado de MNT_LOCKED en un hijo, pero tambi\u00e9n puede provenir de la falta de derechos de administrador en los usuarios del espacio de nombres al que pertenece el montaje. clone_private_mnt() comprueba lo primero, pero no lo segundo. Hay varias comprobaciones de CAP_SYS_ADMIN bastante confusas en varios usuarios durante el montaje, especialmente con la nueva API de montaje; tienen diferentes prop\u00f3sitos y, en el caso de clone_private_mnt(), generalmente, aunque no siempre, cubren la comprobaci\u00f3n faltante mencionada anteriormente.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.4.281\",\"versionEndExcluding\":\"4.5\",\"matchCriteriaId\":\"5535FC0D-74B0-40D6-9F0A-6613211BD394\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.9.280\",\"versionEndExcluding\":\"4.10\",\"matchCriteriaId\":\"DA4F8FAA-0A0A-4B05-9FD2-9B363CB18052\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.14.244\",\"versionEndExcluding\":\"4.15\",\"matchCriteriaId\":\"0BB634A6-F36F-476C-94DA-84A3ABF7A170\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.19.204\",\"versionEndExcluding\":\"4.20\",\"matchCriteriaId\":\"B955CF5A-B1F2-423D-B6CA-0D920E17DF1B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.141\",\"versionEndExcluding\":\"5.5\",\"matchCriteriaId\":\"1418F9CC-F473-45C3-BECA-6717DB26D246\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.59\",\"versionEndExcluding\":\"5.11\",\"matchCriteriaId\":\"E50E0919-685C-4AEA-9CA2-9A611C3C1021\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.13.11\",\"versionEndExcluding\":\"5.14\",\"matchCriteriaId\":\"91EB0938-272F-4A6B-9615-988B8A8B0145\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.14.1\",\"versionEndExcluding\":\"5.15.190\",\"matchCriteriaId\":\"1A202E7B-1B3B-4A22-865A-DDFC127C9289\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.147\",\"matchCriteriaId\":\"A4FD62FC-0DAE-4ACE-8C9C-66156518C3E1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.100\",\"matchCriteriaId\":\"094B81E0-B756-4727-85CA-F3F8D1C9D116\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.40\",\"matchCriteriaId\":\"0099D5A4-B157-4D36-8858-982C7D579030\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.15.3\",\"matchCriteriaId\":\"0541C761-BD5E-4C1A-8432-83B375D7EB92\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.14:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"6A05198E-F8FA-4517-8D0E-8C95066AED38\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.14:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"15013998-4AF0-4CDC-AB13-829ECD8A8E66\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.14:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"376A25CF-C05B-48F1-99B1-8FB0314A8E06\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/36fecd740de2d542d2091d65d36554ee2bcf9c65\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/38628ae06e2a37770cd794802a3f1310cf9846e3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c28f922c9dcee0e4876a2c095939d77fe7e15116\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d717325b5ecf2a40daca85c61923e17f32306179\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/dc6a664089f10eab0fb36b6e4f705022210191d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e77078e52fbf018ab986efb3c79065ab35025607\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-082556.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}"
  }
}


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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.