GSD-2021-47040

Vulnerability from gsd - Updated: 2024-02-28 06:03
Details
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix overflows checks in provide buffers Colin reported before possible overflow and sign extension problems in io_provide_buffers_prep(). As Linus pointed out previous attempt did nothing useful, see d81269fecb8ce ("io_uring: fix provide_buffers sign extension"). Do that with help of check_<op>_overflow helpers. And fix struct io_provide_buf::len type, as it doesn't make much sense to keep it signed.
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{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-47040"
      ],
      "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix overflows checks in provide buffers\n\nColin reported before possible overflow and sign extension problems in\nio_provide_buffers_prep(). As Linus pointed out previous attempt did nothing\nuseful, see d81269fecb8ce (\"io_uring: fix provide_buffers sign extension\").\n\nDo that with help of check_\u003cop\u003e_overflow helpers. And fix struct\nio_provide_buf::len type, as it doesn\u0027t make much sense to keep it\nsigned.",
      "id": "GSD-2021-47040",
      "modified": "2024-02-28T06:03:55.892731Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@kernel.org",
        "ID": "CVE-2021-47040",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Linux",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "efe68c1ca8f4",
                          "version_value": "cbbc13b115b8"
                        },
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected",
                            "versions": [
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                                "status": "affected",
                                "version": "5.8"
                              },
                              {
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                                "status": "unaffected",
                                "version": "0",
                                "versionType": "custom"
                              },
                              {
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                                "version": "5.12.4",
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                              {
                                "lessThanOrEqual": "*",
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      "description": {
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix overflows checks in provide buffers\n\nColin reported before possible overflow and sign extension problems in\nio_provide_buffers_prep(). As Linus pointed out previous attempt did nothing\nuseful, see d81269fecb8ce (\"io_uring: fix provide_buffers sign extension\").\n\nDo that with help of check_\u003cop\u003e_overflow helpers. And fix struct\nio_provide_buf::len type, as it doesn\u0027t make much sense to keep it\nsigned."
          }
        ]
      },
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      "problemtype": {
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          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
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      "references": {
        "reference_data": [
          {
            "name": "https://git.kernel.org/stable/c/cbbc13b115b8f18e0a714d89f87fbdc499acfe2d",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/cbbc13b115b8f18e0a714d89f87fbdc499acfe2d"
          },
          {
            "name": "https://git.kernel.org/stable/c/51bf90901952aaac564bbdb36b2b503050c53dd9",
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          },
          {
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            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/38134ada0ceea3e848fe993263c0ff6207fd46e7"
          }
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    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fix overflows checks in provide buffers\n\nColin reported before possible overflow and sign extension problems in\nio_provide_buffers_prep(). As Linus pointed out previous attempt did nothing\nuseful, see d81269fecb8ce (\"io_uring: fix provide_buffers sign extension\").\n\nDo that with help of check_\u003cop\u003e_overflow helpers. And fix struct\nio_provide_buf::len type, as it doesn\u0027t make much sense to keep it\nsigned."
          }
        ],
        "id": "CVE-2021-47040",
        "lastModified": "2024-02-28T14:06:45.783",
        "metrics": {},
        "published": "2024-02-28T09:15:39.993",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/38134ada0ceea3e848fe993263c0ff6207fd46e7"
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          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}



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