CVE-2023-53493 (GCVE-0-2023-53493)
Vulnerability from cvelistv5
Published
2025-10-01 11:45
Modified
2025-10-01 11:45
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
Impacted products
Vendor Product Version
Linux Linux Version: 129776ac2e38231fa9c02ce20e116c99de291666
Version: 129776ac2e38231fa9c02ce20e116c99de291666
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{
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/accel/qaic/qaic_control.c"
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          "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)"
        }
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      "providerMetadata": {
        "dateUpdated": "2025-10-01T11:45:44.939Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/51b56382ed2a2b03347372272362b3baa623ed1e"
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    "cveId": "CVE-2023-53493",
    "datePublished": "2025-10-01T11:45:44.939Z",
    "dateReserved": "2025-10-01T11:39:39.403Z",
    "dateUpdated": "2025-10-01T11:45:44.939Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53493\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-01T12:15:52.540\",\"lastModified\":\"2025-10-02T19:12:17.160\",\"vulnStatus\":\"Awaiting Analysis\",\"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)\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/51b56382ed2a2b03347372272362b3baa623ed1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/57d14cb3bae4619ce2fb5235cb318c3d5d8f53fd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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