github - ghsa-fppf-vq4v-6j7g

GHSA-FPPF-VQ4V-6J7G

Vulnerability from github – Published: 2025-09-11 18:35 – Updated: 2025-11-26 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

mm/smaps: fix race between smaps_hugetlb_range and migration

smaps_hugetlb_range() handles the pte without holdling ptl, and may be concurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). The race is as follows.

smaps_hugetlb_range migrate_pages huge_ptep_get remove_migration_ptes folio_unlock pfn_swap_entry_folio BUG_ON

To fix it, hold ptl lock in smaps_hugetlb_range().

Severity ?

4.7 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39754"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-11T17:15:39Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/smaps: fix race between smaps_hugetlb_range and migration\n\nsmaps_hugetlb_range() handles the pte without holdling ptl, and may be\nconcurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). \nThe race is as follows.\n\nsmaps_hugetlb_range              migrate_pages\n  huge_ptep_get\n                                   remove_migration_ptes\n\t\t\t\t   folio_unlock\n  pfn_swap_entry_folio\n    BUG_ON\n\nTo fix it, hold ptl lock in smaps_hugetlb_range().",
  "id": "GHSA-fppf-vq4v-6j7g",
  "modified": "2025-11-26T18:31:02Z",
  "published": "2025-09-11T18:35:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39754"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09fc018f48871123ad5dbd7b03c956580232ed76"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a1f3663974162b8f1e098196f557cfc1d160138"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/45d19b4b6c2d422771c29b83462d84afcbb33f01"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b625883ccbcc2b57808db51d1375b1d7b9bcb3e5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-39754 (GCVE-0-2025-39754)

Vulnerability from cvelistv5 – Published: 2025-09-11 16:52 – Updated: 2025-09-29 05:58

Summary

In the Linux kernel, the following vulnerability has been resolved: mm/smaps: fix race between smaps_hugetlb_range and migration smaps_hugetlb_range() handles the pte without holdling ptl, and may be concurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). The race is as follows. smaps_hugetlb_range migrate_pages huge_ptep_get remove_migration_ptes folio_unlock pfn_swap_entry_folio BUG_ON To fix it, hold ptl lock in smaps_hugetlb_range().

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/2a1f3663974162b8f…
	https://git.kernel.org/stable/c/09fc018f48871123a…
	https://git.kernel.org/stable/c/b625883ccbcc2b578…
	https://git.kernel.org/stable/c/45d19b4b6c2d42277…

Impacted products

Vendor

Product

Version

Linux

Affected: 25ee01a2fca02dfb5a3ce316e77910c468108199 , < 2a1f3663974162b8f1e098196f557cfc1d160138 (git)
Affected: 25ee01a2fca02dfb5a3ce316e77910c468108199 , < 09fc018f48871123ad5dbd7b03c956580232ed76 (git)
Affected: 25ee01a2fca02dfb5a3ce316e77910c468108199 , < b625883ccbcc2b57808db51d1375b1d7b9bcb3e5 (git)
Affected: 25ee01a2fca02dfb5a3ce316e77910c468108199 , < 45d19b4b6c2d422771c29b83462d84afcbb33f01 (git)

Linux

Affected: 4.4
Unaffected: 0 , < 4.4 (semver)
Unaffected: 6.12.43 , ≤ 6.12.* (semver)
Unaffected: 6.15.11 , ≤ 6.15.* (semver)
Unaffected: 6.16.2 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/proc/task_mmu.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "2a1f3663974162b8f1e098196f557cfc1d160138",
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          "versions": [
            {
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              "version": "4.4"
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              "status": "unaffected",
              "version": "0",
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              "status": "unaffected",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/smaps: fix race between smaps_hugetlb_range and migration\n\nsmaps_hugetlb_range() handles the pte without holdling ptl, and may be\nconcurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). \nThe race is as follows.\n\nsmaps_hugetlb_range              migrate_pages\n  huge_ptep_get\n                                   remove_migration_ptes\n\t\t\t\t   folio_unlock\n  pfn_swap_entry_folio\n    BUG_ON\n\nTo fix it, hold ptl lock in smaps_hugetlb_range()."
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        "shortName": "Linux"
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    "datePublished": "2025-09-11T16:52:24.763Z",
    "dateReserved": "2025-04-16T07:20:57.125Z",
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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

GHSA-FPPF-VQ4V-6J7G

CVE-2025-39754 (GCVE-0-2025-39754)

Tags

Sightings

Nomenclature