github - ghsa-vwc5-3f53-7rhp

ghsa-vwc5-3f53-7rhp

Vulnerability from github

Published

2025-09-05 18:31

Modified

2025-09-05 18:31

Details

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

userfaultfd: fix a crash in UFFDIO_MOVE when PMD is a migration entry

When UFFDIO_MOVE encounters a migration PMD entry, it proceeds with obtaining a folio and accessing it even though the entry is swp_entry_t. Add the missing check and let split_huge_pmd() handle migration entries. While at it also remove unnecessary folio check.

[surenb@google.com: remove extra folio check, per David]

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38686"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-04T16:15:36Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nuserfaultfd: fix a crash in UFFDIO_MOVE when PMD is a migration entry\n\nWhen UFFDIO_MOVE encounters a migration PMD entry, it proceeds with\nobtaining a folio and accessing it even though the entry is swp_entry_t. \nAdd the missing check and let split_huge_pmd() handle migration entries. \nWhile at it also remove unnecessary folio check.\n\n[surenb@google.com: remove extra folio check, per David]",
  "id": "GHSA-vwc5-3f53-7rhp",
  "modified": "2025-09-05T18:31:15Z",
  "published": "2025-09-05T18:31:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38686"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1202abad7a7ccd28c426d2844771a387b07629a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7f1101a0a181243ad587ececdffc4845f035549f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aba6faec0103ed8f169be8dce2ead41fcb689446"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bb81c18dbd42650c844e160cafa7cbb20243a96a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-38686 (GCVE-0-2025-38686)

Vulnerability from cvelistv5

Published

2025-09-04 15:32

Modified

2025-09-29 05:55

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: userfaultfd: fix a crash in UFFDIO_MOVE when PMD is a migration entry When UFFDIO_MOVE encounters a migration PMD entry, it proceeds with obtaining a folio and accessing it even though the entry is swp_entry_t. Add the missing check and let split_huge_pmd() handle migration entries. While at it also remove unnecessary folio check. [surenb@google.com: remove extra folio check, per David]

References

▼	URL	Tags
	https://git.kernel.org/stable/c/bb81c18dbd42650c844e160cafa7cbb20243a96a
	https://git.kernel.org/stable/c/1202abad7a7ccd28c426d2844771a387b07629a4
	https://git.kernel.org/stable/c/7f1101a0a181243ad587ececdffc4845f035549f
	https://git.kernel.org/stable/c/aba6faec0103ed8f169be8dce2ead41fcb689446

Impacted products

Vendor

Product

Version

▼

Linux

Version: adef440691bab824e39c1b17382322d195e1fab0
Version: adef440691bab824e39c1b17382322d195e1fab0
Version: adef440691bab824e39c1b17382322d195e1fab0
Version: adef440691bab824e39c1b17382322d195e1fab0

Linux

Version: 6.8

Show details on NVD website

JSON

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          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
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              "operator": "OR"
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    "dateReserved": "2025-04-16T04:51:24.032Z",
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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