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    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47111",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen-netback: take a reference to the RX task thread\n\nDo this in order to prevent the task from being freed if the thread\nreturns (which can be triggered by the frontend) before the call to\nkthread_stop done as part of the backend tear down. Not taking the\nreference will lead to a use-after-free in that scenario. Such\nreference was taken before but dropped as part of the rework done in\n2ac061ce97f4.\n\nReintroduce the reference taking and add a comment this time\nexplaining why it's needed.\n\nThis is XSA-374 / CVE-2021-28691."
            }
        ]
    },
    "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": "2ac061ce97f4",
                                            "version_value": "6b53db8c4c14"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.5",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.5",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.43",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.12.10",
                                                        "lessThanOrEqual": "5.12.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.13",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/6b53db8c4c14b4e7256f058d202908b54a7b85b4",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/6b53db8c4c14b4e7256f058d202908b54a7b85b4"
            },
            {
                "url": "https://git.kernel.org/stable/c/caec9bcaeb1a5f03f2d406305355c853af10c13e",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/caec9bcaeb1a5f03f2d406305355c853af10c13e"
            },
            {
                "url": "https://git.kernel.org/stable/c/107866a8eb0b664675a260f1ba0655010fac1e08",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/107866a8eb0b664675a260f1ba0655010fac1e08"
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