{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47276",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Do not blindly read the ip address in ftrace_bug()\n\nIt was reported that a bug on arm64 caused a bad ip address to be used for\nupdating into a nop in ftrace_init(), but the error path (rightfully)\nreturned -EINVAL and not -EFAULT, as the bug caused more than one error to\noccur. But because -EINVAL was returned, the ftrace_bug() tried to report\nwhat was at the location of the ip address, and read it directly. This\ncaused the machine to panic, as the ip was not pointing to a valid memory\naddress.\n\nInstead, read the ip address with copy_from_kernel_nofault() to safely\naccess the memory, and if it faults, report that the address faulted,\notherwise report what was in that location."
            }
        ]
    },
    "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": "05736a427f7e",
                                            "version_value": "0bc62e398bbd"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "2.6.28",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "2.6.28",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.4.273",
                                                        "lessThanOrEqual": "4.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.9.273",
                                                        "lessThanOrEqual": "4.9.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.14.237",
                                                        "lessThanOrEqual": "4.14.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "4.19.195",
                                                        "lessThanOrEqual": "4.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.4.126",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.44",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.12.11",
                                                        "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/0bc62e398bbd9e600959e610def5109957437b28",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/0bc62e398bbd9e600959e610def5109957437b28"
            },
            {
                "url": "https://git.kernel.org/stable/c/4aedc2bc2b32c93555f47c95610efb89cc1ec09b",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/4aedc2bc2b32c93555f47c95610efb89cc1ec09b"
            },
            {
                "url": "https://git.kernel.org/stable/c/acf671ba79c1feccc3ec7cfdcffead4efcec49e7",
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                "name": "https://git.kernel.org/stable/c/acf671ba79c1feccc3ec7cfdcffead4efcec49e7"
            },
            {
                "url": "https://git.kernel.org/stable/c/862dcc14f2803c556bdd73b43c27b023fafce2fb",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/862dcc14f2803c556bdd73b43c27b023fafce2fb"
            },
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                "name": "https://git.kernel.org/stable/c/7e4e824b109f1d41ccf223fbb0565d877d6223a2"
            },
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                "url": "https://git.kernel.org/stable/c/97524384762c1fb9b3ded931498dd2047bd0de81",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/97524384762c1fb9b3ded931498dd2047bd0de81"
            },
            {
                "url": "https://git.kernel.org/stable/c/3e4ddeb68751fb4fb657199aed9cfd5d02796875",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/3e4ddeb68751fb4fb657199aed9cfd5d02796875"
            },
            {
                "url": "https://git.kernel.org/stable/c/6c14133d2d3f768e0a35128faac8aa6ed4815051",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/6c14133d2d3f768e0a35128faac8aa6ed4815051"
            }
        ]
    },
    "generator": {
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