FKIE_CVE-2023-53493

Vulnerability from fkie_nvd - Published: 2025-10-01 12:15 - Updated: 2025-10-02 19:12
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: accel/qaic: tighten bounds checking in decode_message() Copy the bounds checking from encode_message() to decode_message(). This patch addresses the following concerns. Ensure that there is enough space for at least one header so that we don't have a negative size later. if (msg_hdr_len < sizeof(*trans_hdr)) Ensure that we have enough space to read the next header from the msg->data. if (msg_len > msg_hdr_len - sizeof(*trans_hdr)) return -EINVAL; Check that the trans_hdr->len is not below the minimum size: if (hdr_len < sizeof(*trans_hdr)) This minimum check ensures that we don't corrupt memory in decode_passthrough() when we do. memcpy(out_trans->data, in_trans->data, len - sizeof(in_trans->hdr)); And finally, use size_add() to prevent an integer overflow: if (size_add(msg_len, hdr_len) > msg_hdr_len)
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/51b56382ed2a2b03347372272362b3baa623ed1e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/57d14cb3bae4619ce2fb5235cb318c3d5d8f53fd
Impacted products
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/qaic: tighten bounds checking in decode_message()\n\nCopy the bounds checking from encode_message() to decode_message().\n\nThis patch addresses the following concerns.  Ensure that there is\nenough space for at least one header so that we don\u0027t have a negative\nsize later.\n\n\tif (msg_hdr_len \u003c sizeof(*trans_hdr))\n\nEnsure that we have enough space to read the next header from the\nmsg-\u003edata.\n\n\tif (msg_len \u003e msg_hdr_len - sizeof(*trans_hdr))\n\t\treturn -EINVAL;\n\nCheck that the trans_hdr-\u003elen is not below the minimum size:\n\n\tif (hdr_len \u003c sizeof(*trans_hdr))\n\nThis minimum check ensures that we don\u0027t corrupt memory in\ndecode_passthrough() when we do.\n\n\tmemcpy(out_trans-\u003edata, in_trans-\u003edata, len - sizeof(in_trans-\u003ehdr));\n\nAnd finally, use size_add() to prevent an integer overflow:\n\n\tif (size_add(msg_len, hdr_len) \u003e msg_hdr_len)"
    }
  ],
  "id": "CVE-2023-53493",
  "lastModified": "2025-10-02T19:12:17.160",
  "metrics": {},
  "published": "2025-10-01T12:15:52.540",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/51b56382ed2a2b03347372272362b3baa623ed1e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/57d14cb3bae4619ce2fb5235cb318c3d5d8f53fd"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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