ghsa-j89p-6v8w-x2xm
Vulnerability from github
Published
2025-06-18 12:30
Modified
2025-06-18 12:30
Details

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

drm/amd/display: Increase block_sequence array size

[Why] It's possible to generate more than 50 steps in hwss_build_fast_sequence, for example with a 6-pipe asic where all pipes are in one MPC chain. This overflows the block_sequence buffer and corrupts block_sequence_steps, causing a crash.

[How] Expand block_sequence to 100 items. A naive upper bound on the possible number of steps for a 6-pipe asic, ignoring the potential for steps to be mutually exclusive, is 91 with current code, therefore 100 is sufficient.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38080"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T10:15:41Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Increase block_sequence array size\n\n[Why]\nIt\u0027s possible to generate more than 50 steps in hwss_build_fast_sequence,\nfor example with a 6-pipe asic where all pipes are in one MPC chain. This\noverflows the block_sequence buffer and corrupts block_sequence_steps,\ncausing a crash.\n\n[How]\nExpand block_sequence to 100 items. A naive upper bound on the possible\nnumber of steps for a 6-pipe asic, ignoring the potential for steps to be\nmutually exclusive, is 91 with current code, therefore 100 is sufficient.",
  "id": "GHSA-j89p-6v8w-x2xm",
  "modified": "2025-06-18T12:30:34Z",
  "published": "2025-06-18T12:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38080"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a7810c212bcf2f722671dadf4b23ff70a7d23ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bf1666072e7482317cf2302621766482a21a62c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de67e80ab48f1f23663831007a2fa3c1471a7757"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e55c5704b12eeea27e212bfab8f7e51ad3e8ac1f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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