FKIE_CVE-2026-80686

Vulnerability from fkie_nvd - Published: 2026-08-28 08:16 - Updated: 2026-08-28 08:16
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26f9ca8ed42cba25d2c75daff13561cce6019395
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2be94d6b20789b8865b1864dae5fe458ca85e019
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5b948706f11a950bc73c5304630d0a7eafc40daf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/63867c82d0c0c2d182016a32b1cc0103116b0ea5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/86d55447de3738620b9a8272ff167ce97e7f7203
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/migrate_device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "26f9ca8ed42cba25d2c75daff13561cce6019395",
              "status": "affected",
              "version": "6c287605fd56466e645693eff3ae7c08fba56e0a",
              "versionType": "git"
            },
            {
              "lessThan": "5b948706f11a950bc73c5304630d0a7eafc40daf",
              "status": "affected",
              "version": "6c287605fd56466e645693eff3ae7c08fba56e0a",
              "versionType": "git"
            },
            {
              "lessThan": "86d55447de3738620b9a8272ff167ce97e7f7203",
              "status": "affected",
              "version": "6c287605fd56466e645693eff3ae7c08fba56e0a",
              "versionType": "git"
            },
            {
              "lessThan": "2be94d6b20789b8865b1864dae5fe458ca85e019",
              "status": "affected",
              "version": "6c287605fd56466e645693eff3ae7c08fba56e0a",
              "versionType": "git"
            },
            {
              "lessThan": "42f30fa5481a1f90571ccdfbb20d2e25e47ae76e",
              "status": "affected",
              "version": "6c287605fd56466e645693eff3ae7c08fba56e0a",
              "versionType": "git"
            },
            {
              "lessThan": "63867c82d0c0c2d182016a32b1cc0103116b0ea5",
              "status": "affected",
              "version": "6c287605fd56466e645693eff3ae7c08fba56e0a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/migrate_device.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.184",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.153",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-80686",
  "lastModified": "2026-08-28T08:16:54.067",
  "metrics": {},
  "published": "2026-08-28T08:16:54.067",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/26f9ca8ed42cba25d2c75daff13561cce6019395"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2be94d6b20789b8865b1864dae5fe458ca85e019"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5b948706f11a950bc73c5304630d0a7eafc40daf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/63867c82d0c0c2d182016a32b1cc0103116b0ea5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/86d55447de3738620b9a8272ff167ce97e7f7203"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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