CVE-2021-47040 (GCVE-0-2021-47040)
Vulnerability from cvelistv5
Published
2024-02-28 08:13
Modified
2025-05-04 07:02
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff
Version: efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff
Version: efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff
Version: efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:24:39.700Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/cbbc13b115b8f18e0a714d89f87fbdc499acfe2d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/51bf90901952aaac564bbdb36b2b503050c53dd9"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/84b8c266c4bfe9ed5128e13253c388deb74b1b03"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/38134ada0ceea3e848fe993263c0ff6207fd46e7"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47040",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:57:48.348526Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:32:49.892Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/io_uring.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cbbc13b115b8f18e0a714d89f87fbdc499acfe2d",
              "status": "affected",
              "version": "efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff",
              "versionType": "git"
            },
            {
              "lessThan": "51bf90901952aaac564bbdb36b2b503050c53dd9",
              "status": "affected",
              "version": "efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff",
              "versionType": "git"
            },
            {
              "lessThan": "84b8c266c4bfe9ed5128e13253c388deb74b1b03",
              "status": "affected",
              "version": "efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff",
              "versionType": "git"
            },
            {
              "lessThan": "38134ada0ceea3e848fe993263c0ff6207fd46e7",
              "status": "affected",
              "version": "efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/io_uring.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.8"
            },
            {
              "lessThan": "5.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.37",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.11.*",
              "status": "unaffected",
              "version": "5.11.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.37",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.11.21",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.12.4",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.13",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:02:50.136Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cbbc13b115b8f18e0a714d89f87fbdc499acfe2d"
        },
        {
          "url": "https://git.kernel.org/stable/c/51bf90901952aaac564bbdb36b2b503050c53dd9"
        },
        {
          "url": "https://git.kernel.org/stable/c/84b8c266c4bfe9ed5128e13253c388deb74b1b03"
        },
        {
          "url": "https://git.kernel.org/stable/c/38134ada0ceea3e848fe993263c0ff6207fd46e7"
        }
      ],
      "title": "io_uring: fix overflows checks in provide buffers",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47040",
    "datePublished": "2024-02-28T08:13:46.557Z",
    "dateReserved": "2024-02-27T18:42:55.968Z",
    "dateUpdated": "2025-05-04T07:02:50.136Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47040\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-28T09:15:39.993\",\"lastModified\":\"2025-01-09T15:29:49.397\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: io_uring: soluciona comprobaciones de desbordamiento en los buffers de suministro que Colin inform\u00f3 antes de posibles problemas de desbordamiento y extensi\u00f3n de firma en io_provide_buffers_prep(). Como Linus se\u00f1al\u00f3 que el intento anterior no hizo nada \u00fatil, consulte d81269fecb8ce (\\\"io_uring: corrige la extensi\u00f3n de signo provide_buffers\\\"). Haga esto con la ayuda de los ayudantes check__overflow. Y corrija el tipo struct io_provide_buf::len, ya que no tiene mucho sentido mantenerlo firmado.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-120\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.8\",\"versionEndExcluding\":\"5.10.37\",\"matchCriteriaId\":\"CD2F1C00-3D81-452B-AE61-0B2C1A536A1D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.11.21\",\"matchCriteriaId\":\"8CBB94EC-EC33-4464-99C5-03E5542715F0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12\",\"versionEndExcluding\":\"5.12.4\",\"matchCriteriaId\":\"D8C7052F-1B7B-4327-9C2B-84EBF3243838\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/38134ada0ceea3e848fe993263c0ff6207fd46e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/51bf90901952aaac564bbdb36b2b503050c53dd9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/84b8c266c4bfe9ed5128e13253c388deb74b1b03\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cbbc13b115b8f18e0a714d89f87fbdc499acfe2d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/38134ada0ceea3e848fe993263c0ff6207fd46e7\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/51bf90901952aaac564bbdb36b2b503050c53dd9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/84b8c266c4bfe9ed5128e13253c388deb74b1b03\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cbbc13b115b8f18e0a714d89f87fbdc499acfe2d\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/cbbc13b115b8f18e0a714d89f87fbdc499acfe2d\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/51bf90901952aaac564bbdb36b2b503050c53dd9\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/84b8c266c4bfe9ed5128e13253c388deb74b1b03\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/38134ada0ceea3e848fe993263c0ff6207fd46e7\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:24:39.700Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47040\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:57:48.348526Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:12.912Z\"}}], \"cna\": {\"title\": \"io_uring: fix overflows checks in provide buffers\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff\", \"lessThan\": \"cbbc13b115b8f18e0a714d89f87fbdc499acfe2d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff\", \"lessThan\": \"51bf90901952aaac564bbdb36b2b503050c53dd9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff\", \"lessThan\": \"84b8c266c4bfe9ed5128e13253c388deb74b1b03\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff\", \"lessThan\": \"38134ada0ceea3e848fe993263c0ff6207fd46e7\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/io_uring.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.37\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.11.21\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.11.*\"}, {\"status\": \"unaffected\", \"version\": \"5.12.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.12.*\"}, {\"status\": \"unaffected\", \"version\": \"5.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/io_uring.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/cbbc13b115b8f18e0a714d89f87fbdc499acfe2d\"}, {\"url\": \"https://git.kernel.org/stable/c/51bf90901952aaac564bbdb36b2b503050c53dd9\"}, {\"url\": \"https://git.kernel.org/stable/c/84b8c266c4bfe9ed5128e13253c388deb74b1b03\"}, {\"url\": \"https://git.kernel.org/stable/c/38134ada0ceea3e848fe993263c0ff6207fd46e7\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.37\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.11.21\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.12.4\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.13\", \"versionStartIncluding\": \"5.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:02:50.136Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47040\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:02:50.136Z\", \"dateReserved\": \"2024-02-27T18:42:55.968Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-28T08:13:46.557Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.