CVE-2025-40179 (GCVE-0-2025-40179)

Vulnerability from cvelistv5 – Published: 2025-11-12 21:56 – Updated: 2025-12-01 06:19
VLAI?
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 , < 95a21611b14ae0a401720645245a8db16f040995 (git)
Affected: 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 , < 566a1d6084563bd07433025aa23bcea4427de107 (git)
Affected: 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 , < 304fc34ff6fc8261138fd81f119e024ac3a129e9 (git)
Affected: 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 , < a2d803fab8a6c6a874277cb80156dc114db91921 (git)
Affected: 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 , < 2b9da798ff0f4d026c5f0f815047393ebe7d8859 (git)
Affected: 02f310fcf47fa9311d6ba2946a8d19e7d7d11f37 , < 0a6ce20c156442a4ce2a404747bb0fb05d54eeb3 (git)
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    Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.195 , ≤ 5.15.* (semver)
Unaffected: 6.1.157 , ≤ 6.1.* (semver)
Unaffected: 6.6.113 , ≤ 6.6.* (semver)
Unaffected: 6.12.54 , ≤ 6.12.* (semver)
Unaffected: 6.17.4 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "fs/ext4/orphan.c"
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              "lessThanOrEqual": "6.17.*",
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              "version": "6.18",
              "versionType": "original_commit_for_fix"
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        }
      ],
      "cpeApplicability": [
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          "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."
        }
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      "providerMetadata": {
        "dateUpdated": "2025-12-01T06:19:35.872Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      ],
      "title": "ext4: verify orphan file size is not too big",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40179",
    "datePublished": "2025-11-12T21:56:24.882Z",
    "dateReserved": "2025-04-16T07:20:57.177Z",
    "dateUpdated": "2025-12-01T06:19:35.872Z",
    "state": "PUBLISHED"
  },
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  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.