GHSA-M9FP-2X7C-5R66

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-28 09:31
VLAI
Details

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

mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE

pte_pfn() and pte_dirty() have undefined behaviour when called on a non-present PTE. In migrate_vma_collect_pmd(), these functions may be invoked on non-present entries (e.g., device-private entries), leading to potential crashes from pte_pfn() or incorrect dirty folio accounting from pte_dirty(). Fix both by guarding with pte_present() checks.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80686"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:54Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE\n\npte_pfn() and pte_dirty() have undefined behaviour when called on a\nnon-present PTE. In migrate_vma_collect_pmd(), these functions may be\ninvoked on non-present entries (e.g., device-private entries), leading\nto potential crashes from pte_pfn() or incorrect dirty folio accounting\nfrom pte_dirty(). Fix both by guarding with pte_present() checks.",
  "id": "GHSA-m9fp-2x7c-5r66",
  "modified": "2026-08-28T09:31:49Z",
  "published": "2026-08-28T09:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80686"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26f9ca8ed42cba25d2c75daff13561cce6019395"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2be94d6b20789b8865b1864dae5fe458ca85e019"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b948706f11a950bc73c5304630d0a7eafc40daf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63867c82d0c0c2d182016a32b1cc0103116b0ea5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86d55447de3738620b9a8272ff167ce97e7f7203"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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