{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47269",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc3: ep0: fix NULL pointer exception\n\nThere is no validation of the index from dwc3_wIndex_to_dep() and we might\nbe referring a non-existing ep and trigger a NULL pointer exception. In\ncertain configurations we might use fewer eps and the index might wrongly\nindicate a larger ep index than existing.\n\nBy adding this validation from the patch we can actually report a wrong\nindex back to the caller.\n\nIn our usecase we are using a composite device on an older kernel, but\nupstream might use this fix also. Unfortunately, I cannot describe the\nhardware for others to reproduce the issue as it is a proprietary\nimplementation.\n\n[   82.958261] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a4\n[   82.966891] Mem abort info:\n[   82.969663]   ESR = 0x96000006\n[   82.972703]   Exception class = DABT (current EL), IL = 32 bits\n[   82.978603]   SET = 0, FnV = 0\n[   82.981642]   EA = 0, S1PTW = 0\n[   82.984765] Data abort info:\n[   82.987631]   ISV = 0, ISS = 0x00000006\n[   82.991449]   CM = 0, WnR = 0\n[   82.994409] user pgtable: 4k pages, 39-bit VAs, pgdp = 00000000c6210ccc\n[   83.000999] [00000000000000a4] pgd=0000000053aa5003, pud=0000000053aa5003, pmd=0000000000000000\n[   83.009685] Internal error: Oops: 96000006 [#1] PREEMPT SMP\n[   83.026433] Process irq/62-dwc3 (pid: 303, stack limit = 0x000000003985154c)\n[   83.033470] CPU: 0 PID: 303 Comm: irq/62-dwc3 Not tainted 4.19.124 #1\n[   83.044836] pstate: 60000085 (nZCv daIf -PAN -UAO)\n[   83.049628] pc : dwc3_ep0_handle_feature+0x414/0x43c\n[   83.054558] lr : dwc3_ep0_interrupt+0x3b4/0xc94\n\n...\n\n[   83.141788] Call trace:\n[   83.144227]  dwc3_ep0_handle_feature+0x414/0x43c\n[   83.148823]  dwc3_ep0_interrupt+0x3b4/0xc94\n[   83.181546] ---[ end trace aac6b5267d84c32f ]---"
            }
        ]
    },
    "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": "96b74a99d360"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "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"
                                            }
                                        }
                                    ]
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                            }
                        ]
                    }
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            ]
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    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/96b74a99d360235c24052f1d060e64ac53f43528",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/96b74a99d360235c24052f1d060e64ac53f43528"
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            {
                "url": "https://git.kernel.org/stable/c/60156089f07e724e4dc8483702d5e1ede4522749",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/60156089f07e724e4dc8483702d5e1ede4522749"
            },
            {
                "url": "https://git.kernel.org/stable/c/990dc90750772622d44ca2ea6652c521e6f67e16",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/990dc90750772622d44ca2ea6652c521e6f67e16"
            },
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                "url": "https://git.kernel.org/stable/c/bd551e7c85939de2182010273450bfa78c3742fc",
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                "name": "https://git.kernel.org/stable/c/bd551e7c85939de2182010273450bfa78c3742fc"
            },
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                "url": "https://git.kernel.org/stable/c/366369b89bedd59b1425386e8d4a18a466e420e4",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/366369b89bedd59b1425386e8d4a18a466e420e4"
            },
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                "url": "https://git.kernel.org/stable/c/470403639114895e2697c766fbe17be8d0e9b67a",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/470403639114895e2697c766fbe17be8d0e9b67a"
            },
            {
                "url": "https://git.kernel.org/stable/c/788755756dd4a6aba1de479fec20b0fa600e7f19",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/788755756dd4a6aba1de479fec20b0fa600e7f19"
            },
            {
                "url": "https://git.kernel.org/stable/c/d00889080ab60051627dab1d85831cd9db750e2a",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/d00889080ab60051627dab1d85831cd9db750e2a"
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