{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "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>"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/block/ublk_drv.c"
               ],
               "versions": [
                  {
                     "version": "c732a852b419",
                     "lessThan": "ca249435893d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c732a852b419",
                     "lessThan": "136a29d8112d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c732a852b419",
                     "lessThan": "7c890ef60bf4",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "c732a852b419",
                     "lessThan": "e58f5142f883",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/block/ublk_drv.c"
               ],
               "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"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/ca249435893dda766f3845c15ca77ca5672022d8"
            },
            {
               "url": "https://git.kernel.org/stable/c/136a29d8112df4ea0a57f9602ddf3579e04089dc"
            },
            {
               "url": "https://git.kernel.org/stable/c/7c890ef60bf417d3fe5c6f7a9f6cef0e1d77f74f"
            },
            {
               "url": "https://git.kernel.org/stable/c/e58f5142f88320a5b1449f96a146f2f24615c5c7"
            }
         ],
         "title": "ublk_drv: fix NULL pointer dereference in ublk_ctrl_start_recovery()",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-46735",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}