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CVE-2026-53015

Estado: AnalizadaMedia (5.5)—

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

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-53015",
  "cveTags": [],
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          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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          "programFiles": [
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  "published": "2026-06-24T17:17:12.790",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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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 << 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"
    }
  ],
  "lastModified": "2026-07-15T13:55:28.020",
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}