{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-46735",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nublk_drv: fix NULL pointer dereference in ublk_ctrl_start_recovery()\n\nWhen two UBLK_CMD_START_USER_RECOVERY commands are submitted, the\nfirst one sets 'ubq->ubq_daemon' to NULL, and the second one triggers\nWARN in ublk_queue_reinit() and subsequently a NULL pointer dereference\nissue.\n\nFix it by adding the check in ublk_ctrl_start_recovery() and return\nimmediately in case of zero 'ub->nr_queues_ready'.\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000028\n  RIP: 0010:ublk_ctrl_start_recovery.constprop.0+0x82/0x180\n  Call Trace:\n   <TASK>\n   ? __die+0x20/0x70\n   ? page_fault_oops+0x75/0x170\n   ? exc_page_fault+0x64/0x140\n   ? asm_exc_page_fault+0x22/0x30\n   ? ublk_ctrl_start_recovery.constprop.0+0x82/0x180\n   ublk_ctrl_uring_cmd+0x4f7/0x6c0\n   ? pick_next_task_idle+0x26/0x40\n   io_uring_cmd+0x9a/0x1b0\n   io_issue_sqe+0x193/0x3f0\n   io_wq_submit_work+0x9b/0x390\n   io_worker_handle_work+0x165/0x360\n   io_wq_worker+0xcb/0x2f0\n   ? finish_task_switch.isra.0+0x203/0x290\n   ? finish_task_switch.isra.0+0x203/0x290\n   ? __pfx_io_wq_worker+0x10/0x10\n   ret_from_fork+0x2d/0x50\n   ? __pfx_io_wq_worker+0x10/0x10\n   ret_from_fork_asm+0x1a/0x30\n   </TASK>"
            }
        ]
    },
    "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": "c732a852b419",
                                            "version_value": "ca249435893d"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "6.1",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "6.1",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.1.110",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.6.51",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.10.10",
                                                        "lessThanOrEqual": "6.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.11",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/ca249435893dda766f3845c15ca77ca5672022d8",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/ca249435893dda766f3845c15ca77ca5672022d8"
            },
            {
                "url": "https://git.kernel.org/stable/c/136a29d8112df4ea0a57f9602ddf3579e04089dc",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/136a29d8112df4ea0a57f9602ddf3579e04089dc"
            },
            {
                "url": "https://git.kernel.org/stable/c/7c890ef60bf417d3fe5c6f7a9f6cef0e1d77f74f",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/7c890ef60bf417d3fe5c6f7a9f6cef0e1d77f74f"
            },
            {
                "url": "https://git.kernel.org/stable/c/e58f5142f88320a5b1449f96a146f2f24615c5c7",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/e58f5142f88320a5b1449f96a146f2f24615c5c7"
            }
        ]
    },
    "generator": {
        "engine": "bippy-c9c4e1df01b2"
    }
}