CVE-2021-47477 (GCVE-0-2021-47477)

Vulnerability from cvelistv5 – Published: 2024-05-22 08:19 – Updated: 2025-05-04 07:11
VLAI?
Title
comedi: dt9812: fix DMA buffers on stack
Summary
In the Linux kernel, the following vulnerability has been resolved: comedi: dt9812: fix DMA buffers on stack USB transfer buffers are typically mapped for DMA and must not be allocated on the stack or transfers will fail. Allocate proper transfer buffers in the various command helpers and return an error on short transfers instead of acting on random stack data. Note that this also fixes a stack info leak on systems where DMA is not used as 32 bytes are always sent to the device regardless of how short the command is.
Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 63274cd7d38a3322d90b66a5bc976de1fb899051 , < a6af69768d5cb4b2528946d53be5fa19ade37723 (git)
Affected: 63274cd7d38a3322d90b66a5bc976de1fb899051 , < 365a346cda82f51d835c49136a00a9df8a78c7f2 (git)
Affected: 63274cd7d38a3322d90b66a5bc976de1fb899051 , < 8a52bc480992c7c9da3ebfea456af731f50a4b97 (git)
Affected: 63274cd7d38a3322d90b66a5bc976de1fb899051 , < 39ea61037ae78f14fa121228dd962ea3280eacf3 (git)
Affected: 63274cd7d38a3322d90b66a5bc976de1fb899051 , < 3efb7af8ac437085b6c776e5b54830b149d86efe (git)
Affected: 63274cd7d38a3322d90b66a5bc976de1fb899051 , < 786f5b03450454557ff858a8bead5d7c0cbf78d6 (git)
Affected: 63274cd7d38a3322d90b66a5bc976de1fb899051 , < 3ac273d154d634e2034508a14db82a95d7ad12ed (git)
Affected: 63274cd7d38a3322d90b66a5bc976de1fb899051 , < 20cebb8b620dc987e55ddc46801de986e081757e (git)
Affected: 63274cd7d38a3322d90b66a5bc976de1fb899051 , < 536de747bc48262225889a533db6650731ab25d3 (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.29
Unaffected: 0 , < 2.6.29 (semver)
Unaffected: 4.4.292 , ≤ 4.4.* (semver)
Unaffected: 4.9.290 , ≤ 4.9.* (semver)
Unaffected: 4.14.255 , ≤ 4.14.* (semver)
Unaffected: 4.19.217 , ≤ 4.19.* (semver)
Unaffected: 5.4.159 , ≤ 5.4.* (semver)
Unaffected: 5.10.79 , ≤ 5.10.* (semver)
Unaffected: 5.14.18 , ≤ 5.14.* (semver)
Unaffected: 5.15.2 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "LOW",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-47477",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-22T15:50:06.158354Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "description": "CWE-noinfo Not enough information",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-11-06T19:35:17.051Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:39:59.539Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/a6af69768d5cb4b2528946d53be5fa19ade37723"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/365a346cda82f51d835c49136a00a9df8a78c7f2"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/8a52bc480992c7c9da3ebfea456af731f50a4b97"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/39ea61037ae78f14fa121228dd962ea3280eacf3"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/3efb7af8ac437085b6c776e5b54830b149d86efe"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/786f5b03450454557ff858a8bead5d7c0cbf78d6"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/3ac273d154d634e2034508a14db82a95d7ad12ed"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/20cebb8b620dc987e55ddc46801de986e081757e"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/536de747bc48262225889a533db6650731ab25d3"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/comedi/drivers/dt9812.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a6af69768d5cb4b2528946d53be5fa19ade37723",
              "status": "affected",
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "versionType": "git"
            },
            {
              "lessThan": "365a346cda82f51d835c49136a00a9df8a78c7f2",
              "status": "affected",
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "versionType": "git"
            },
            {
              "lessThan": "8a52bc480992c7c9da3ebfea456af731f50a4b97",
              "status": "affected",
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "versionType": "git"
            },
            {
              "lessThan": "39ea61037ae78f14fa121228dd962ea3280eacf3",
              "status": "affected",
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "versionType": "git"
            },
            {
              "lessThan": "3efb7af8ac437085b6c776e5b54830b149d86efe",
              "status": "affected",
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "versionType": "git"
            },
            {
              "lessThan": "786f5b03450454557ff858a8bead5d7c0cbf78d6",
              "status": "affected",
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "versionType": "git"
            },
            {
              "lessThan": "3ac273d154d634e2034508a14db82a95d7ad12ed",
              "status": "affected",
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "versionType": "git"
            },
            {
              "lessThan": "20cebb8b620dc987e55ddc46801de986e081757e",
              "status": "affected",
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "versionType": "git"
            },
            {
              "lessThan": "536de747bc48262225889a533db6650731ab25d3",
              "status": "affected",
              "version": "63274cd7d38a3322d90b66a5bc976de1fb899051",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/comedi/drivers/dt9812.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.29"
            },
            {
              "lessThan": "2.6.29",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.4.*",
              "status": "unaffected",
              "version": "4.4.292",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.290",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.255",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.217",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.79",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.14.*",
              "status": "unaffected",
              "version": "5.14.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.16",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.4.292",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.290",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.255",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.217",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.159",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.79",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.14.18",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.2",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.16",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncomedi: dt9812: fix DMA buffers on stack\n\nUSB transfer buffers are typically mapped for DMA and must not be\nallocated on the stack or transfers will fail.\n\nAllocate proper transfer buffers in the various command helpers and\nreturn an error on short transfers instead of acting on random stack\ndata.\n\nNote that this also fixes a stack info leak on systems where DMA is not\nused as 32 bytes are always sent to the device regardless of how short\nthe command is."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:11:51.469Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a6af69768d5cb4b2528946d53be5fa19ade37723"
        },
        {
          "url": "https://git.kernel.org/stable/c/365a346cda82f51d835c49136a00a9df8a78c7f2"
        },
        {
          "url": "https://git.kernel.org/stable/c/8a52bc480992c7c9da3ebfea456af731f50a4b97"
        },
        {
          "url": "https://git.kernel.org/stable/c/39ea61037ae78f14fa121228dd962ea3280eacf3"
        },
        {
          "url": "https://git.kernel.org/stable/c/3efb7af8ac437085b6c776e5b54830b149d86efe"
        },
        {
          "url": "https://git.kernel.org/stable/c/786f5b03450454557ff858a8bead5d7c0cbf78d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/3ac273d154d634e2034508a14db82a95d7ad12ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/20cebb8b620dc987e55ddc46801de986e081757e"
        },
        {
          "url": "https://git.kernel.org/stable/c/536de747bc48262225889a533db6650731ab25d3"
        }
      ],
      "title": "comedi: dt9812: fix DMA buffers on stack",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47477",
    "datePublished": "2024-05-22T08:19:30.860Z",
    "dateReserved": "2024-05-22T06:20:56.200Z",
    "dateUpdated": "2025-05-04T07:11:51.469Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/a6af69768d5cb4b2528946d53be5fa19ade37723\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/365a346cda82f51d835c49136a00a9df8a78c7f2\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/8a52bc480992c7c9da3ebfea456af731f50a4b97\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/39ea61037ae78f14fa121228dd962ea3280eacf3\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/3efb7af8ac437085b6c776e5b54830b149d86efe\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/786f5b03450454557ff858a8bead5d7c0cbf78d6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/3ac273d154d634e2034508a14db82a95d7ad12ed\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/20cebb8b620dc987e55ddc46801de986e081757e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/536de747bc48262225889a533db6650731ab25d3\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:39:59.539Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47477\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-22T15:50:06.158354Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-23T19:01:25.552Z\"}}], \"cna\": {\"title\": \"comedi: dt9812: fix DMA buffers on stack\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"63274cd7d38a3322d90b66a5bc976de1fb899051\", \"lessThan\": \"a6af69768d5cb4b2528946d53be5fa19ade37723\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63274cd7d38a3322d90b66a5bc976de1fb899051\", \"lessThan\": \"365a346cda82f51d835c49136a00a9df8a78c7f2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63274cd7d38a3322d90b66a5bc976de1fb899051\", \"lessThan\": \"8a52bc480992c7c9da3ebfea456af731f50a4b97\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63274cd7d38a3322d90b66a5bc976de1fb899051\", \"lessThan\": \"39ea61037ae78f14fa121228dd962ea3280eacf3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63274cd7d38a3322d90b66a5bc976de1fb899051\", \"lessThan\": \"3efb7af8ac437085b6c776e5b54830b149d86efe\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63274cd7d38a3322d90b66a5bc976de1fb899051\", \"lessThan\": \"786f5b03450454557ff858a8bead5d7c0cbf78d6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63274cd7d38a3322d90b66a5bc976de1fb899051\", \"lessThan\": \"3ac273d154d634e2034508a14db82a95d7ad12ed\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63274cd7d38a3322d90b66a5bc976de1fb899051\", \"lessThan\": \"20cebb8b620dc987e55ddc46801de986e081757e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"63274cd7d38a3322d90b66a5bc976de1fb899051\", \"lessThan\": \"536de747bc48262225889a533db6650731ab25d3\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/comedi/drivers/dt9812.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.29\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.29\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.4.292\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.4.*\"}, {\"status\": \"unaffected\", \"version\": \"4.9.290\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.255\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.217\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.159\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.79\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14.18\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/comedi/drivers/dt9812.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/a6af69768d5cb4b2528946d53be5fa19ade37723\"}, {\"url\": \"https://git.kernel.org/stable/c/365a346cda82f51d835c49136a00a9df8a78c7f2\"}, {\"url\": \"https://git.kernel.org/stable/c/8a52bc480992c7c9da3ebfea456af731f50a4b97\"}, {\"url\": \"https://git.kernel.org/stable/c/39ea61037ae78f14fa121228dd962ea3280eacf3\"}, {\"url\": \"https://git.kernel.org/stable/c/3efb7af8ac437085b6c776e5b54830b149d86efe\"}, {\"url\": \"https://git.kernel.org/stable/c/786f5b03450454557ff858a8bead5d7c0cbf78d6\"}, {\"url\": \"https://git.kernel.org/stable/c/3ac273d154d634e2034508a14db82a95d7ad12ed\"}, {\"url\": \"https://git.kernel.org/stable/c/20cebb8b620dc987e55ddc46801de986e081757e\"}, {\"url\": \"https://git.kernel.org/stable/c/536de747bc48262225889a533db6650731ab25d3\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncomedi: dt9812: fix DMA buffers on stack\\n\\nUSB transfer buffers are typically mapped for DMA and must not be\\nallocated on the stack or transfers will fail.\\n\\nAllocate proper transfer buffers in the various command helpers and\\nreturn an error on short transfers instead of acting on random stack\\ndata.\\n\\nNote that this also fixes a stack info leak on systems where DMA is not\\nused as 32 bytes are always sent to the device regardless of how short\\nthe command is.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.4.292\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.290\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.255\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.217\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.159\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.79\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.14.18\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.2\", \"versionStartIncluding\": \"2.6.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16\", \"versionStartIncluding\": \"2.6.29\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:11:51.469Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-47477\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T07:11:51.469Z\", \"dateReserved\": \"2024-05-22T06:20:56.200Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-22T08:19:30.860Z\", \"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 observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.