CVE-2026-80686 (GCVE-0-2026-80686)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:52 – Updated: 2026-08-28 06:52
VLAI
Title
mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6c287605fd56466e645693eff3ae7c08fba56e0a , < 26f9ca8ed42cba25d2c75daff13561cce6019395 (git)
Affected: 6c287605fd56466e645693eff3ae7c08fba56e0a , < 5b948706f11a950bc73c5304630d0a7eafc40daf (git)
Affected: 6c287605fd56466e645693eff3ae7c08fba56e0a , < 86d55447de3738620b9a8272ff167ce97e7f7203 (git)
Affected: 6c287605fd56466e645693eff3ae7c08fba56e0a , < 2be94d6b20789b8865b1864dae5fe458ca85e019 (git)
Affected: 6c287605fd56466e645693eff3ae7c08fba56e0a , < 42f30fa5481a1f90571ccdfbb20d2e25e47ae76e (git)
Affected: 6c287605fd56466e645693eff3ae7c08fba56e0a , < 63867c82d0c0c2d182016a32b1cc0103116b0ea5 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.184 , ≤ 6.1.* (semver)
Unaffected: 6.6.153 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.184",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.153",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.103",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.44",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.8",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-28T06:52:51.924Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/26f9ca8ed42cba25d2c75daff13561cce6019395"
        },
        {
          "url": "https://git.kernel.org/stable/c/5b948706f11a950bc73c5304630d0a7eafc40daf"
        },
        {
          "url": "https://git.kernel.org/stable/c/86d55447de3738620b9a8272ff167ce97e7f7203"
        },
        {
          "url": "https://git.kernel.org/stable/c/2be94d6b20789b8865b1864dae5fe458ca85e019"
        },
        {
          "url": "https://git.kernel.org/stable/c/42f30fa5481a1f90571ccdfbb20d2e25e47ae76e"
        },
        {
          "url": "https://git.kernel.org/stable/c/63867c82d0c0c2d182016a32b1cc0103116b0ea5"
        }
      ],
      "title": "mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80686",
    "datePublished": "2026-08-28T06:52:51.924Z",
    "dateReserved": "2026-08-26T14:34:25.784Z",
    "dateUpdated": "2026-08-28T06:52:51.924Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-80686",
      "date": "2026-09-01",
      "epss": "0.00172",
      "percentile": "0.06779"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-80686\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-28T08:16:54.067\",\"lastModified\":\"2026-08-28T08:16:54.067\",\"vulnStatus\":\"Received\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"mm/migrate_device.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6c287605fd56466e645693eff3ae7c08fba56e0a\",\"lessThan\":\"26f9ca8ed42cba25d2c75daff13561cce6019395\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c287605fd56466e645693eff3ae7c08fba56e0a\",\"lessThan\":\"5b948706f11a950bc73c5304630d0a7eafc40daf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c287605fd56466e645693eff3ae7c08fba56e0a\",\"lessThan\":\"86d55447de3738620b9a8272ff167ce97e7f7203\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c287605fd56466e645693eff3ae7c08fba56e0a\",\"lessThan\":\"2be94d6b20789b8865b1864dae5fe458ca85e019\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c287605fd56466e645693eff3ae7c08fba56e0a\",\"lessThan\":\"42f30fa5481a1f90571ccdfbb20d2e25e47ae76e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6c287605fd56466e645693eff3ae7c08fba56e0a\",\"lessThan\":\"63867c82d0c0c2d182016a32b1cc0103116b0ea5\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"mm/migrate_device.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.19\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.19\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.184\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.153\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.103\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.44\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.8\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-01T07:35:36+00:00",
      "cve": "CVE-2026-80686",
      "id": "CVE-2026-80686",
      "initial_release_date": "2026-08-28T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mm: migrate_device: fix pte_pfn/pte_dirty called on non-present PTE",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80686.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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

Author Source Type Date Other

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.