FKIE_CVE-2026-46078

Vulnerability from fkie_nvd - Published: 2026-05-27 14:17 - Updated: 2026-05-27 14:48
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: erofs: fix the out-of-bounds nameoff handling for trailing dirents Currently we already have boundary-checks for nameoffs, but the trailing dirents are special since the namelens are calculated with strnlen() with unchecked nameoffs. If a crafted EROFS has a trailing dirent with nameoff >= maxsize, maxsize - nameoff can underflow, causing strnlen() to read past the directory block. nameoff0 should also be verified to be a multiple of `sizeof(struct erofs_dirent)` as well [1]. [1] https://sashiko.dev/#/patchset/20260416063511.3173774-1-hsiangkao%40linux.alibaba.com
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1d55445226c75ddd4e78b09b3e7d99109b28c366
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/222055e6b4063abd2d9e13c3d49bbd1724c50789
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/48b27a955d22391c7f30169fa7b6b2e1977f1ce4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8ebb951a284b7446e025afc7dc5e9516ef9a7214
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d18a3b5d337fa412a38e776e6b4b857a58836575
Impacted products
Vendor Product Version
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix the out-of-bounds nameoff handling for trailing dirents\n\nCurrently we already have boundary-checks for nameoffs, but the trailing\ndirents are special since the namelens are calculated with strnlen()\nwith unchecked nameoffs.\n\nIf a crafted EROFS has a trailing dirent with nameoff \u003e= maxsize,\nmaxsize - nameoff can underflow, causing strnlen() to read past the\ndirectory block.\n\nnameoff0 should also be verified to be a multiple of\n`sizeof(struct erofs_dirent)` as well [1].\n\n[1] https://sashiko.dev/#/patchset/20260416063511.3173774-1-hsiangkao%40linux.alibaba.com"
    }
  ],
  "id": "CVE-2026-46078",
  "lastModified": "2026-05-27T14:48:03.013",
  "metrics": {},
  "published": "2026-05-27T14:17:29.143",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1d55445226c75ddd4e78b09b3e7d99109b28c366"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/222055e6b4063abd2d9e13c3d49bbd1724c50789"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/48b27a955d22391c7f30169fa7b6b2e1977f1ce4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8ebb951a284b7446e025afc7dc5e9516ef9a7214"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d18a3b5d337fa412a38e776e6b4b857a58836575"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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