{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47012",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Fix a use after free in siw_alloc_mr\n\nOur code analyzer reported a UAF.\n\nIn siw_alloc_mr(), it calls siw_mr_add_mem(mr,..). In the implementation of\nsiw_mr_add_mem(), mem is assigned to mr->mem and then mem is freed via\nkfree(mem) if xa_alloc_cyclic() failed. Here, mr->mem still point to a\nfreed object. After, the execution continue up to the err_out branch of\nsiw_alloc_mr, and the freed mr->mem is used in siw_mr_drop_mem(mr).\n\nMy patch moves \"mr->mem = mem\" behind the if (xa_alloc_cyclic(..)<0) {}\nsection, to avoid the uaf."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "2251334dcac9",
                                            "version_value": "30b9e92d0b5e"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.3",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.3",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.4.119",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.37",
                                                        "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": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
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                                                "defaultStatus": "affected"
                                            }
                                        }
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                        ]
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            ]
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    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/30b9e92d0b5e5d5dc1101ab856c17009537cbca4",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/30b9e92d0b5e5d5dc1101ab856c17009537cbca4"
            },
            {
                "url": "https://git.kernel.org/stable/c/608a4b90ece039940e9425ee2b39c8beff27e00c",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/608a4b90ece039940e9425ee2b39c8beff27e00c"
            },
            {
                "url": "https://git.kernel.org/stable/c/3e22b88e02c194f6c80867abfef5cc09383461f4",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/3e22b88e02c194f6c80867abfef5cc09383461f4"
            },
            {
                "url": "https://git.kernel.org/stable/c/ad9ce7188432650469a6c7625bf479f5ed0b6155",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/ad9ce7188432650469a6c7625bf479f5ed0b6155"
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            {
                "url": "https://git.kernel.org/stable/c/3093ee182f01689b89e9f8797b321603e5de4f63",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/3093ee182f01689b89e9f8797b321603e5de4f63"
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