{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2021-47077",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qedf: Add pointer checks in qedf_update_link_speed()\n\nThe following trace was observed:\n\n [   14.042059] Call Trace:\n [   14.042061]  <IRQ>\n [   14.042068]  qedf_link_update+0x144/0x1f0 [qedf]\n [   14.042117]  qed_link_update+0x5c/0x80 [qed]\n [   14.042135]  qed_mcp_handle_link_change+0x2d2/0x410 [qed]\n [   14.042155]  ? qed_set_ptt+0x70/0x80 [qed]\n [   14.042170]  ? qed_set_ptt+0x70/0x80 [qed]\n [   14.042186]  ? qed_rd+0x13/0x40 [qed]\n [   14.042205]  qed_mcp_handle_events+0x437/0x690 [qed]\n [   14.042221]  ? qed_set_ptt+0x70/0x80 [qed]\n [   14.042239]  qed_int_sp_dpc+0x3a6/0x3e0 [qed]\n [   14.042245]  tasklet_action_common.isra.14+0x5a/0x100\n [   14.042250]  __do_softirq+0xe4/0x2f8\n [   14.042253]  irq_exit+0xf7/0x100\n [   14.042255]  do_IRQ+0x7f/0xd0\n [   14.042257]  common_interrupt+0xf/0xf\n [   14.042259]  </IRQ>\n\nAPI qedf_link_update() is getting called from QED but by that time\nshost_data is not initialised. This results in a NULL pointer dereference\nwhen we try to dereference shost_data while updating supported_speeds.\n\nAdd a NULL pointer check before dereferencing shost_data."
            }
        ]
    },
    "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": "61d8658b4a43",
                                            "version_value": "a6362a737572"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "4.11",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "4.11",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.40",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.12.7",
                                                        "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/a6362a737572f66051deb7637f3f77ddf7a4402f",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/a6362a737572f66051deb7637f3f77ddf7a4402f"
            },
            {
                "url": "https://git.kernel.org/stable/c/11014efcec378bb0050a6cf08eaf375e3693400a",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/11014efcec378bb0050a6cf08eaf375e3693400a"
            },
            {
                "url": "https://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/73578af92a0fae6609b955fcc9113e50e413c80f"
            }
        ]
    },
    "generator": {
        "engine": "bippy-a5840b7849dd"
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}