FKIE_CVE-2025-40179

Vulnerability from fkie_nvd - Published: 2025-11-12 22:15 - Updated: 2026-10-19 21:10
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: verify orphan file size is not too big In principle orphan file can be arbitrarily large. However orphan replay needs to traverse it all and we also pin all its buffers in memory. Thus filesystems with absurdly large orphan files can lead to big amounts of memory consumed. Limit orphan file size to a sane value and also use kvmalloc() for allocating array of block descriptor structures to avoid large order allocations for sane but large orphan files.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a6ce20c156442a4ce2a404747bb0fb05d54eeb3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2b9da798ff0f4d026c5f0f815047393ebe7d8859
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/304fc34ff6fc8261138fd81f119e024ac3a129e9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/566a1d6084563bd07433025aa23bcea4427de107
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/95a21611b14ae0a401720645245a8db16f040995
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a2d803fab8a6c6a874277cb80156dc114db91921
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/ext4/orphan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "95a21611b14ae0a401720645245a8db16f040995",
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "versionType": "git"
            },
            {
              "lessThan": "566a1d6084563bd07433025aa23bcea4427de107",
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "versionType": "git"
            },
            {
              "lessThan": "304fc34ff6fc8261138fd81f119e024ac3a129e9",
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "versionType": "git"
            },
            {
              "lessThan": "a2d803fab8a6c6a874277cb80156dc114db91921",
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "versionType": "git"
            },
            {
              "lessThan": "2b9da798ff0f4d026c5f0f815047393ebe7d8859",
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "versionType": "git"
            },
            {
              "lessThan": "0a6ce20c156442a4ce2a404747bb0fb05d54eeb3",
              "status": "affected",
              "version": "02f310fcf47fa9311d6ba2946a8d19e7d7d11f37",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/ext4/orphan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.195",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "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\next4: verify orphan file size is not too big\n\nIn principle orphan file can be arbitrarily large. However orphan replay\nneeds to traverse it all and we also pin all its buffers in memory. Thus\nfilesystems with absurdly large orphan files can lead to big amounts of\nmemory consumed. Limit orphan file size to a sane value and also use\nkvmalloc() for allocating array of block descriptor structures to avoid\nlarge order allocations for sane but large orphan files."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\next4: verificar que el tama\u00f1o del archivo hu\u00e9rfano no sea demasiado grande\n\nEn principio, un archivo hu\u00e9rfano puede ser arbitrariamente grande. Sin embargo, la reproducci\u00f3n de hu\u00e9rfanos necesita recorrerlo todo y tambi\u00e9n fijamos todos sus b\u00faferes en memoria. As\u00ed, los sistemas de archivos con archivos hu\u00e9rfanos absurdamente grandes pueden llevar a grandes cantidades de memoria consumida. Limitar el tama\u00f1o del archivo hu\u00e9rfano a un valor razonable y tambi\u00e9n usar kvmalloc() para asignar un array de estructuras de descriptores de bloques para evitar asignaciones de orden grande para archivos hu\u00e9rfanos razonables pero grandes."
    }
  ],
  "id": "CVE-2025-40179",
  "lastModified": "2026-10-19T21:10:00.160",
  "metrics": {},
  "published": "2025-11-12T22:15:44.613",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0a6ce20c156442a4ce2a404747bb0fb05d54eeb3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2b9da798ff0f4d026c5f0f815047393ebe7d8859"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/304fc34ff6fc8261138fd81f119e024ac3a129e9"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/566a1d6084563bd07433025aa23bcea4427de107"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/95a21611b14ae0a401720645245a8db16f040995"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a2d803fab8a6c6a874277cb80156dc114db91921"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.