{
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    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47035",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Remove WO permissions on second-level paging entries\n\nWhen the first level page table is used for IOVA translation, it only\nsupports Read-Only and Read-Write permissions. The Write-Only permission\nis not supported as the PRESENT bit (implying Read permission) should\nalways set. When using second level, we still give separate permissions\nthat allows WriteOnly which seems inconsistent and awkward. We want to\nhave consistent behavior. After moving to 1st level, we don't want things\nto work sometimes, and break if we use 2nd level for the same mappings.\nHence remove this configuration."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
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                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
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                                            "version_affected": "<",
                                            "version_name": "b802d070a52a",
                                            "version_value": "c848416cc05a"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.6",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.6",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
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                                                    {
                                                        "version": "5.10.37",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.38",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.11.21",
                                                        "lessThanOrEqual": "5.11.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.12.4",
                                                        "lessThanOrEqual": "5.12.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.13",
                                                        "lessThanOrEqual": "*",
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                                                        "versionType": "original_commit_for_fix"
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    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/c848416cc05afc1589edba04fe00b85c2f797ee3",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/c848416cc05afc1589edba04fe00b85c2f797ee3"
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                "url": "https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/89bd620798704a8805fc9db0d71d7f812cf5b3d2"
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            {
                "url": "https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/25faff78138933244c678c7fc78f7c0340fa04a0"
            },
            {
                "url": "https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/66c24699f266ff310381a9552d3576eea8ad6e20"
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                "name": "https://git.kernel.org/stable/c/eea53c5816889ee8b64544fa2e9311a81184ff9c"
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