{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47334",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc/libmasm/module: Fix two use after free in ibmasm_init_one\n\nIn ibmasm_init_one, it calls ibmasm_init_remote_input_dev().\nInside ibmasm_init_remote_input_dev, mouse_dev and keybd_dev are\nallocated by input_allocate_device(), and assigned to\nsp->remote.mouse_dev and sp->remote.keybd_dev respectively.\n\nIn the err_free_devices error branch of ibmasm_init_one,\nmouse_dev and keybd_dev are freed by input_free_device(), and return\nerror. Then the execution runs into error_send_message error branch\nof ibmasm_init_one, where ibmasm_free_remote_input_dev(sp) is called\nto unregister the freed sp->remote.mouse_dev and sp->remote.keybd_dev.\n\nMy patch add a \"error_init_remote\" label to handle the error of\nibmasm_init_remote_input_dev(), to avoid the uaf bugs."
            }
        ]
    },
    "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": "1da177e4c3f4",
                                            "version_value": "1512e7dc5eb0"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "4.4.276",
                                                        "lessThanOrEqual": "4.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "4.9.276",
                                                        "lessThanOrEqual": "4.9.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "4.14.240",
                                                        "lessThanOrEqual": "4.14.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "4.19.198",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.4.134",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.10.52",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.12.19",
                                                        "lessThanOrEqual": "5.12.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.13.4",
                                                        "lessThanOrEqual": "5.13.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.14",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/1512e7dc5eb08b7d92a12e2bfcd9cb8c4a1ec069",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/1512e7dc5eb08b7d92a12e2bfcd9cb8c4a1ec069"
            },
            {
                "url": "https://git.kernel.org/stable/c/29ba8e2ba89ee2862a26d91204dd5fe77ceee25a",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/29ba8e2ba89ee2862a26d91204dd5fe77ceee25a"
            },
            {
                "url": "https://git.kernel.org/stable/c/5b06ca113bf197aab2ab61288f42506e0049fbab",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/5b06ca113bf197aab2ab61288f42506e0049fbab"
            },
            {
                "url": "https://git.kernel.org/stable/c/481a76d4749ee3a27f902ba213fdcbb4bb39720e",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/481a76d4749ee3a27f902ba213fdcbb4bb39720e"
            },
            {
                "url": "https://git.kernel.org/stable/c/38660031e80eaa6cc9370b031c180612f414b00d",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/38660031e80eaa6cc9370b031c180612f414b00d"
            },
            {
                "url": "https://git.kernel.org/stable/c/b9c87ce3bc6331f82811a8cf8e930423c22523a3",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/b9c87ce3bc6331f82811a8cf8e930423c22523a3"
            },
            {
                "url": "https://git.kernel.org/stable/c/ef1067d2baa847d53c9988510d99fb494de4d12c",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/ef1067d2baa847d53c9988510d99fb494de4d12c"
            },
            {
                "url": "https://git.kernel.org/stable/c/a7268e8a227d5a4f0bd1584f556246b0224ab274",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/a7268e8a227d5a4f0bd1584f556246b0224ab274"
            },
            {
                "url": "https://git.kernel.org/stable/c/7272b591c4cb9327c43443f67b8fbae7657dd9ae",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/7272b591c4cb9327c43443f67b8fbae7657dd9ae"
            }
        ]
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