{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47290",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: Fix NULL dereference on XCOPY completion\n\nCPU affinity control added with commit 39ae3edda325 (\"scsi: target: core:\nMake completion affinity configurable\") makes target_complete_cmd() queue\nwork on a CPU based on se_tpg->se_tpg_wwn->cmd_compl_affinity state.\n\nLIO's EXTENDED COPY worker is a special case in that read/write cmds are\ndispatched using the global xcopy_pt_tpg, which carries a NULL se_tpg_wwn\npointer following initialization in target_xcopy_setup_pt().\n\nThe NULL xcopy_pt_tpg->se_tpg_wwn pointer is dereferenced on completion of\nany EXTENDED COPY initiated read/write cmds. E.g using the libiscsi\nSCSI.ExtendedCopy.Simple test:\n\n  BUG: kernel NULL pointer dereference, address: 00000000000001a8\n  RIP: 0010:target_complete_cmd+0x9d/0x130 [target_core_mod]\n  Call Trace:\n   fd_execute_rw+0x148/0x42a [target_core_file]\n   ? __dynamic_pr_debug+0xa7/0xe0\n   ? target_check_reservation+0x5b/0x940 [target_core_mod]\n   __target_execute_cmd+0x1e/0x90 [target_core_mod]\n   transport_generic_new_cmd+0x17c/0x330 [target_core_mod]\n   target_xcopy_issue_pt_cmd+0x9/0x60 [target_core_mod]\n   target_xcopy_read_source.isra.7+0x10b/0x1b0 [target_core_mod]\n   ? target_check_fua+0x40/0x40 [target_core_mod]\n   ? transport_complete_task_attr+0x130/0x130 [target_core_mod]\n   target_xcopy_do_work+0x61f/0xc00 [target_core_mod]\n\nThis fix makes target_complete_cmd() queue work on se_cmd->cpuid if\nse_tpg_wwn is NULL."
            }
        ]
    },
    "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": "39ae3edda325",
                                            "version_value": "e7732c5a19a1"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.13",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.13",
                                                        "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/e7732c5a19a15a62b0b23fd683a639b0483e1f40",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/e7732c5a19a15a62b0b23fd683a639b0483e1f40"
            },
            {
                "url": "https://git.kernel.org/stable/c/a47fa41381a09e5997afd762664db4f5f6657e03",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/a47fa41381a09e5997afd762664db4f5f6657e03"
            }
        ]
    },
    "generator": {
        "engine": "bippy-a5840b7849dd"
    }
}