CVE-2021-47046

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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't change the code, but it's 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"}]}

{"bugzilla": {"description": "kernel: drm/amd/display: Fix off by one in hdmi_14_process_transaction()", "id": "2267014", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2267014"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-121", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/amd/display: Fix off by one in hdmi_14_process_transaction()\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.\nI also declared several of these arrays as having HDCP_MESSAGE_ID_MAX\nentries. This doesn't change the code, but it's just a belt and\nsuspenders approach to try future proof the code.", "An off-by-one read overflow was found in the Linux kernel in the hdmi_14_process_transaction() function. This issue may lead to a crash."], "name": "CVE-2021-47046", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47046\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47046\nhttps://lore.kernel.org/linux-cve-announce/2024022839-CVE-2021-47046-3ffe@gregkh/T/#u"], "statement": "Red Hat Enterprise Linux 8 and 9 are not affected by this vulnerability.", "threat_severity": "Moderate"}

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