ghsa-x2v6-jx2x-c364
Vulnerability from github
Published
2025-09-12 18:31
Modified
2025-09-12 18:31
Details

In the Linux kernel, the following vulnerability has been resolved:

block: avoid possible overflow for chunk_sectors check in blk_stack_limits()

In blk_stack_limits(), we check that the t->chunk_sectors value is a multiple of the t->physical_block_size value.

However, by finding the chunk_sectors value in bytes, we may overflow the unsigned int which holds chunk_sectors, so change the check to be based on sectors.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-39795"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-12T16:15:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: avoid possible overflow for chunk_sectors check in blk_stack_limits()\n\nIn blk_stack_limits(), we check that the t-\u003echunk_sectors value is a\nmultiple of the t-\u003ephysical_block_size value.\n\nHowever, by finding the chunk_sectors value in bytes, we may overflow\nthe unsigned int which holds chunk_sectors, so change the check to be\nbased on sectors.",
  "id": "GHSA-x2v6-jx2x-c364",
  "modified": "2025-09-12T18:31:10Z",
  "published": "2025-09-12T18:31:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39795"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14beeef4aafecc8a41de534e31fb5be94739392f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31f2f080898e50cbf2bae62d35f9f2a997547b38"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b9d69f0e68aa6b0acd9791c45d445154a8c66e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/418751910044649baa2b424ea31cce3fc4dcc253"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/448dfecc7ff807822ecd47a5c052acedca7d09e8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46aa80ef49594ed7de685ecbc673b291e9a2c159"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e276e6ff9aacf8901b9c3265c3cdd2568c9fff2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b3ce085b52e674290cbfdd07034e7653ffbe4dc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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