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CVE-2025-38058 (GCVE-0-2025-38058)

Vulnerability from cvelistv5 – Published: 2025-06-18 09:33 – Updated: 2026-08-05 11:59
VLAI
Title
__legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock
Summary
In the Linux kernel, the following vulnerability has been resolved: __legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock ... or we risk stealing final mntput from sync umount - raising mnt_count after umount(2) has verified that victim is not busy, but before it has set MNT_SYNC_UMOUNT; in that case __legitimize_mnt() doesn't see that it's safe to quietly undo mnt_count increment and leaves dropping the reference to caller, where it'll be a full-blown mntput(). Check under mount_lock is needed; leaving the current one done before taking that makes no sense - it's nowhere near common enough to bother with.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 48a066e72d970a3e225a9c18690d570c736fc455 , < 628fb00195ce21a90cf9e4e3d105cd9e58f77b40 (git)
Affected: 48a066e72d970a3e225a9c18690d570c736fc455 , < b89eb56a378b7b2c1176787fc228d0a57172bdd5 (git)
Affected: 48a066e72d970a3e225a9c18690d570c736fc455 , < f6d45fd92f62845cbd1eb5128fd8f0ed7d0c5a42 (git)
Affected: 48a066e72d970a3e225a9c18690d570c736fc455 , < 9b0915e72b3cf52474dcee0b24a2f99d93e604a3 (git)
Affected: 48a066e72d970a3e225a9c18690d570c736fc455 , < d8ece4ced3b051e656c77180df2e69e19e24edc1 (git)
Affected: 48a066e72d970a3e225a9c18690d570c736fc455 , < 8cafd7266fa02e0863bacbf872fe635c0b9725eb (git)
Affected: 48a066e72d970a3e225a9c18690d570c736fc455 , < b55996939c71a3e1a38f3cdc6a8859797efc9083 (git)
Affected: 48a066e72d970a3e225a9c18690d570c736fc455 , < 250cf3693060a5f803c5f1ddc082bb06b16112a9 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.13
Unaffected: 0 , < 3.13 (semver)
Unaffected: 5.4.294 , ≤ 5.4.* (semver)
Unaffected: 5.10.238 , ≤ 5.10.* (semver)
Unaffected: 5.15.185 , ≤ 5.15.* (semver)
Unaffected: 6.1.141 , ≤ 6.1.* (semver)
Unaffected: 6.6.93 , ≤ 6.6.* (semver)
Unaffected: 6.12.31 , ≤ 6.12.* (semver)
Unaffected: 6.14.9 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
guessed Create a notification for this product.
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
guessed Create a notification for this product.
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\n__legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock\n\n... or we risk stealing final mntput from sync umount - raising mnt_count\nafter umount(2) has verified that victim is not busy, but before it\nhas set MNT_SYNC_UMOUNT; in that case __legitimize_mnt() doesn\u0027t see\nthat it\u0027s safe to quietly undo mnt_count increment and leaves dropping\nthe reference to caller, where it\u0027ll be a full-blown mntput().\n\nCheck under mount_lock is needed; leaving the current one done before\ntaking that makes no sense - it\u0027s nowhere near common enough to bother\nwith."
          },
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            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: __legitimize_mnt(): la comprobaci\u00f3n de MNT_SYNC_UMOUNT debe estar bajo mount_lock... o corremos el riesgo de robar la mntput final de sync umount, lo que genera mnt_count despu\u00e9s de que umount(2) haya verificado que la v\u00edctima no est\u00e1 ocupada, pero antes de que haya establecido MNT_SYNC_UMOUNT. En ese caso, __legitimize_mnt() no considera que sea seguro deshacer silenciosamente el incremento de mnt_count y contin\u00faa eliminando la referencia al llamador, donde se ejecutar\u00e1 una mntput() completa. Es necesaria la comprobaci\u00f3n bajo mount_lock; dejar la actual activada antes de tomarla no tiene sentido; no es lo suficientemente com\u00fan como para molestarse en hacerlo."
          }
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        "id": "CVE-2025-38058",
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        "metrics": {
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                "attackVector": "LOCAL",
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                "baseScore": 7.8,
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                "integrityImpact": "HIGH",
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                "scope": "UNCHANGED",
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      "cve": "CVE-2025-38058",
      "id": "CVE-2025-38058",
      "initial_release_date": "2025-06-18T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: __legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38058.json",
      "version": "3"
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      "cve": "CVE-2025-38058",
      "id": "CVE-2025-38058",
      "initial_release_date": "2025-06-19T03:14:47Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "752",
      "product_status:known_not_affected": "34",
      "product_status:recommended": "509",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38058",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38058.json",
      "version": "52"
    }
  }
}



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Tags
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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.