FKIE_CVE-2021-47046

Vulnerability from fkie_nvd - Published: 2024-02-28 09:15 - Updated: 2026-06-17 04:16
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix off by one in hdmi_14_process_transaction() The hdcp_i2c_offsets[] array did not have an entry for HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE so it led to an off by one read overflow. I added an entry and copied the 0x0 value for the offset from similar code in drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c. I also declared several of these arrays as having HDCP_MESSAGE_ID_MAX entries. This doesn't change the code, but it's just a belt and suspenders approach to try future proof the code.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/hdcp/hdcp_msg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "403c4528e5887af3deb9838cb77a557631d1e138",
              "status": "affected",
              "version": "4c283fdac08abf3211533f70623c90a34f41d08d",
              "versionType": "git"
            },
            {
              "lessThan": "6a58310d5d1e5b02d0fc9b393ba540c9367bced5",
              "status": "affected",
              "version": "4c283fdac08abf3211533f70623c90a34f41d08d",
              "versionType": "git"
            },
            {
              "lessThan": "080bd41d6478a64edf96704fddcda52b1fd5fed7",
              "status": "affected",
              "version": "4c283fdac08abf3211533f70623c90a34f41d08d",
              "versionType": "git"
            },
            {
              "lessThan": "8e6fafd5a22e7a2eb216f5510db7aab54cc545c1",
              "status": "affected",
              "version": "4c283fdac08abf3211533f70623c90a34f41d08d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/hdcp/hdcp_msg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.5"
            },
            {
              "lessThan": "5.5",
              "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7A4CF5D6-ACBA-4980-ABFD-3D7A53B5BB4E",
              "versionEndExcluding": "5.10.37",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8CBB94EC-EC33-4464-99C5-03E5542715F0",
              "versionEndExcluding": "5.11.21",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D8C7052F-1B7B-4327-9C2B-84EBF3243838",
              "versionEndExcluding": "5.12.4",
              "versionStartIncluding": "5.12",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix off by one in hdmi_14_process_transaction()\n\nThe hdcp_i2c_offsets[] array did not have an entry for\nHDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE so it led to an off by one\nread overflow.  I added an entry and copied the 0x0 value for the offset\nfrom similar code in drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c.\n\nI also declared several of these arrays as having HDCP_MESSAGE_ID_MAX\nentries.  This doesn\u0027t change the code, but it\u0027s just a belt and\nsuspenders approach to try future proof the code."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: drm/amd/display: correcci\u00f3n por uno en hdmi_14_process_transaction() La matriz hdcp_i2c_offsets[] no ten\u00eda una entrada para HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE, por lo que provoc\u00f3 un desbordamiento de lectura desactivado por uno. Agregu\u00e9 una entrada y copi\u00e9 el valor 0x0 para el desplazamiento de un c\u00f3digo similar en drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c. Tambi\u00e9n declar\u00e9 que varias de estas matrices ten\u00edan entradas HDCP_MESSAGE_ID_MAX. Esto no cambia el c\u00f3digo, pero es solo un enfoque de cintur\u00f3n y tirantes para probar el c\u00f3digo a prueba de futuro."
    }
  ],
  "id": "CVE-2021-47046",
  "lastModified": "2026-06-17T04:16:18.060",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47046",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-02-28T20:31:21.379702Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-02-28T09:15:40.277",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-193"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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