Vulnerability-Lookup

RHSA-2025:23730

Vulnerability from csaf_redhat - Published: 2025-12-22 00:37 - Updated: 2026-01-08 03:24

Summary

Red Hat Security Advisory: kpatch-patch-5_14_0-611_9_1 security update

Notes

Topic

An update for kpatch-patch-5_14_0-611_9_1 is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details

This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel. This patch module is targeted for kernel-5.14.0-611.9.1.el9_7. Security Fix(es): * kernel: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns (CVE-2025-38499) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

JSON

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      "cwe": {
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        "name": "Incorrect Privilege Assignment"
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      "discovery_date": "2025-08-11T00:00:00+00:00",
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          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nclone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns\n\nWhat we want is to verify there is that clone won\u0027t expose something\nhidden by a mount we wouldn\u0027t be able to undo.  \"Wouldn\u0027t be able to undo\"\nmay be a result of MNT_LOCKED on a child, but it may also come from\nlacking admin rights in the userns of the namespace mount belongs to.\n\nclone_private_mnt() checks the former, but not the latter.\n\nThere\u0027s a number of rather confusing CAP_SYS_ADMIN checks in various\nuserns during the mount, especially with the new mount API; they serve\ndifferent purposes and in case of clone_private_mnt() they usually,\nbut not always end up covering the missing check mentioned above.",
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          "text": "kernel: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "clone_private_mount() lacked a ns_capable(..., CAP_SYS_ADMIN) check for the user namespace that owns the target mount namespace. A local attacker in a user/mount namespace could privately clone a mount and expose content hidden by mounts they are not allowed to undo, effectively bypassing mount policy (confidentiality impact and sometimes integrity too).",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "date": "2025-12-22T00:37:17+00:00",
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            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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            "BaseOS-9.7.0.Z.MAIN:kpatch-patch-5_14_0-611_9_1-debuginfo-0:1-1.el9_7.x86_64",
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            "BaseOS-9.7.0.Z.MAIN:kpatch-patch-5_14_0-611_9_1-debugsource-0:1-1.el9_7.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2025-08-11 16:01 – Updated: 2025-11-03 17:39

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

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/36fecd740de2d542d…
	https://git.kernel.org/stable/c/d717325b5ecf2a40d…
	https://git.kernel.org/stable/c/dc6a664089f10eab0…
	https://git.kernel.org/stable/c/e77078e52fbf018ab…
	https://git.kernel.org/stable/c/38628ae06e2a37770…
	https://git.kernel.org/stable/c/c28f922c9dcee0e48…

Impacted products

Vendor

Product

Version

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)

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)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

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.

Action not permitted

RHSA-2025:23730

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

Tags

Sightings

Nomenclature