GHSA-G27R-592C-R436

Vulnerability from github – Published: 2026-06-25 09:31 – Updated: 2026-06-28 09:31
VLAI
Details

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

mm/huge_memory: update file PMD counter before folio_put()

__split_huge_pmd_locked() updates the file/shmem RSS counter after dropping the PMD mapping's folio reference. If folio_put() drops the last reference, mm_counter_file() can later read freed folio state via folio_test_swapbacked().

Move the counter update before folio_put().

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-53189"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-25T09:16:36Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/huge_memory: update file PMD counter before folio_put()\n\n__split_huge_pmd_locked() updates the file/shmem RSS counter after\ndropping the PMD mapping\u0027s folio reference.  If folio_put() drops the last\nreference, mm_counter_file() can later read freed folio state via\nfolio_test_swapbacked().\n\nMove the counter update before folio_put().",
  "id": "GHSA-g27r-592c-r436",
  "modified": "2026-06-28T09:31:43Z",
  "published": "2026-06-25T09:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53189"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/108963978a681c0c468d279cac2b930c27672877"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/459771c9cf30f378bdbd30fc65d17f7eb931bb59"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f5b604e1e6bde4e889199168ee80fe8306d06ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6c29a8ba084e89499ca77b947e07ae817f9c16ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/84b3212b166b446faea27ebebb7161405ffceef9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d878059924f12c1bc24556a92ec56add74de3c8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ae9d4caf6f133e884cf5fcda4982c493b35e5194"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed5b030931292c94133437ac5e5ff580e498eabd"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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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

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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.
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  • 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.