{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47294",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetrom: Decrease sock refcount when sock timers expire\n\nCommit 63346650c1a9 (\"netrom: switch to sock timer API\") switched to use\nsock timer API. It replaces mod_timer() by sk_reset_timer(), and\ndel_timer() by sk_stop_timer().\n\nFunction sk_reset_timer() will increase the refcount of sock if it is\ncalled on an inactive timer, hence, in case the timer expires, we need to\ndecrease the refcount ourselves in the handler, otherwise, the sock\nrefcount will be unbalanced and the sock will never be freed."
            }
        ]
    },
    "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": "ce29e8a259de",
                                            "version_value": "853262355518"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "baa9e32336bf",
                                            "version_value": "a01634bf91f2"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "0adf571fa34b",
                                            "version_value": "48866fd5c361"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "2c6b572458a9",
                                            "version_value": "9619cc7d97c3"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "63346650c1a9",
                                            "version_value": "25df44e90ff5"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.0",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.0",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.4.277",
                                                        "lessThanOrEqual": "4.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.9.277",
                                                        "lessThanOrEqual": "4.9.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.14.241",
                                                        "lessThanOrEqual": "4.14.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.19.199",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.4.136",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.54",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.13.6",
                                                        "lessThanOrEqual": "5.13.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.14",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/853262355518cd1247515b74e83fabf038aa6c29",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/853262355518cd1247515b74e83fabf038aa6c29"
            },
            {
                "url": "https://git.kernel.org/stable/c/a01634bf91f2b6c42583770eb6815fb6d1e251cf",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/a01634bf91f2b6c42583770eb6815fb6d1e251cf"
            },
            {
                "url": "https://git.kernel.org/stable/c/48866fd5c361ea417ed24b43fc2a7dc2f5b060ef",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/48866fd5c361ea417ed24b43fc2a7dc2f5b060ef"
            },
            {
                "url": "https://git.kernel.org/stable/c/9619cc7d97c3aa8ed3cfd2b8678b74fb6d6c7950",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/9619cc7d97c3aa8ed3cfd2b8678b74fb6d6c7950"
            },
            {
                "url": "https://git.kernel.org/stable/c/25df44e90ff5959b5c24ad361b648504a7e39ef3",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/25df44e90ff5959b5c24ad361b648504a7e39ef3"
            },
            {
                "url": "https://git.kernel.org/stable/c/6811744bd0efb9e472cb15d066cdb460beb8cb8a",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/6811744bd0efb9e472cb15d066cdb460beb8cb8a"
            },
            {
                "url": "https://git.kernel.org/stable/c/bc1660206c3723c37ed4d622ad81781f1e987250",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/bc1660206c3723c37ed4d622ad81781f1e987250"
            },
            {
                "url": "https://git.kernel.org/stable/c/517a16b1a88bdb6b530f48d5d153478b2552d9a8",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/517a16b1a88bdb6b530f48d5d153478b2552d9a8"
            }
        ]
    },
    "generator": {
        "engine": "bippy-a5840b7849dd"
    }
}