CVE-2026-53015 (GCVE-0-2026-53015)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-24 16:29
VLAI
Title
erofs: unify lcn as u64 for 32-bit platforms
Summary
In the Linux kernel, the following vulnerability has been resolved: erofs: unify lcn as u64 for 32-bit platforms As sashiko reported [1], `lcn` was typed as `unsigned long` (or `unsigned int` sometimes), which is only 32 bits wide on 32-bit platforms, which causes `(lcn << lclusterbits)` to be truncated at 4 GiB. In order to consolidate the logic, just use `u64` consistently around the codebase. [1] https://sashiko.dev/r/20260420034612.1899973-1-hsiangkao%40linux.alibaba.com
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 152a333a589560bee002e4c96761f1b560a5793c , < 4fc9b12e43a3f19a01a8fb61f7961be79de20253 (git)
Affected: 152a333a589560bee002e4c96761f1b560a5793c , < 858e4d98a86adf34584767388deb6c9b217f70c5 (git)
Affected: 152a333a589560bee002e4c96761f1b560a5793c , < 582b0bf201157632cb5474c885989a6ebda46521 (git)
Affected: 152a333a589560bee002e4c96761f1b560a5793c , < 2d8c7edcb661812249469f4a5b62e9339118846f (git)
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Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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          "programFiles": [
            "fs/erofs/zmap.c"
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: unify lcn as u64 for 32-bit platforms\n\nAs sashiko reported [1], `lcn` was typed as `unsigned long` (or\n`unsigned int` sometimes), which is only 32 bits wide on 32-bit\nplatforms, which causes `(lcn \u003c\u003c lclusterbits)` to be truncated\nat 4 GiB.\n\nIn order to consolidate the logic, just use `u64` consistently\naround the codebase.\n\n[1] https://sashiko.dev/r/20260420034612.1899973-1-hsiangkao%40linux.alibaba.com"
        }
      ],
      "providerMetadata": {
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        "shortName": "Linux"
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    "datePublished": "2026-06-24T16:29:25.396Z",
    "dateReserved": "2026-06-09T07:44:35.378Z",
    "dateUpdated": "2026-06-24T16:29:25.396Z",
    "state": "PUBLISHED"
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  }
}


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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

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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.