{
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    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47152",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: fix data stream corruption\n\nMaxim reported several issues when forcing a TCP transparent proxy\nto use the MPTCP protocol for the inbound connections. He also\nprovided a clean reproducer.\n\nThe problem boils down to 'mptcp_frag_can_collapse_to()' assuming\nthat only MPTCP will use the given page_frag.\n\nIf others - e.g. the plain TCP protocol - allocate page fragments,\nwe can end-up re-using already allocated memory for mptcp_data_frag.\n\nFix the issue ensuring that the to-be-expanded data fragment is\nlocated at the current page frag end.\n\nv1 -> v2:\n - added missing fixes tag (Mat)"
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
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                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
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                                            "version_name": "18b683bff89d",
                                            "version_value": "3267a061096e"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.7",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.7",
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                                                    {
                                                        "version": "5.10.42",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
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                                                    {
                                                        "version": "5.12.9",
                                                        "lessThanOrEqual": "5.12.*",
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                                                        "versionType": "custom"
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                                                    {
                                                        "version": "5.13",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
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                                                "defaultStatus": "affected"
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    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/3267a061096efc91eda52c2a0c61ba76e46e4b34",
                "refsource": "MISC",
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                "url": "https://git.kernel.org/stable/c/18e7f0580da15cac1e79d73683ada5a9e70980f8",
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                "name": "https://git.kernel.org/stable/c/18e7f0580da15cac1e79d73683ada5a9e70980f8"
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            {
                "url": "https://git.kernel.org/stable/c/29249eac5225429b898f278230a6ca2baa1ae154",
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