{
  "cveId": "CVE-2022-49176",
  "url": "https://patchblox.com/security/cve/CVE-2022-49176",
  "summary": "CVE-2022-49176 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49176, released February 26, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  bfq: fix use-after-free in bfq_dispatch_request...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  bfq: fix use-after-free in bfq_dispatch_request  KASAN reports a use-after-free report when doing normal scsi-mq test  [69832.239032] ================================================================== [69832.241810] BUG: KASAN: use-after-free in bfq_dispatch_request\u002B0x1045/0x44b0 [69832.243267] Read of size 8 at addr ffff88802622ba88 by task kworker/3:1H/155 [69832.244656] [69832.245007] CPU: 3 PID: 155 Comm: kworker/3:1H Not tainted 5.10.0-10295-g576c6382529e #8 [69832.246626] Hardware name: QEMU Standard PC (i440FX \u002B PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 [69832.249069] Workqueue: kblockd blk_mq_run_work_fn [69832.250022] Call Trace: [69832.250541]  dump_stack\u002B0x9b/0xce [69832.251232]  ? bfq_dispatch_request\u002B0x1045/0x44b0 [69832.252243]  print_address_description.constprop.6\u002B0x3e/0x60 [69832.253381]  ? __cpuidle_text_end\u002B0x5/0x5 [69832.254211]  ? vprintk_func\u002B0x6b/0x120 [69832.254994]  ? bfq_dispatch_request\u002B0x1045/0x44b0 [69832.255952]  ? bfq_dispatch_request\u002B0x1045/0x44b0 [69832.256914]  kasan_report.cold.9\u002B0x22/0x3a [69832.257753]  ? bfq_dispatch_request\u002B0x1045/0x44b0 [69832.258755]  check_memory_region\u002B0x1c1/0x1e0 [69832.260248]  bfq_dispatch_request\u002B0x1045/0x44b0 [69832.261181]  ? bfq_bfqq_expire\u002B0x2440/0x2440 [69832.262032]  ? blk_mq_delay_run_hw_queues\u002B0xf9/0x170 [69832.263022]  __blk_mq_do_dispatch_sched\u002B0x52f/0x830 [69832.264011]  ? blk_mq_sched_request_inserted\u002B0x100/0x100 [69832.265101]  __blk_mq_sched_dispatch_requests\u002B0x398/0x4f0 [69832.266206]  ? blk_mq_do_dispatch_ctx\u002B0x570/0x570 [69832.267147]  ? __switch_to\u002B0x5f4/0xee0 [69832.267898]  blk_mq_sched_dispatch_requests\u002B0xdf/0x140 [69832.268946]  __blk_mq_run_hw_queue\u002B0xc0/0x270 [69832.269840]  blk_mq_run_work_fn\u002B0x51/0x60 [69832.278170]  process_one_work\u002B0x6d4/0xfe0 [69832.278984]  worker_thread\u002B0x91/0xc80 [69832.279726]  ? __kthread_parkme\u002B0xb0/0x110 [69832.280554]  ? process_one_work\u002B0xfe0/0xfe0 [69832.281414]  kthread\u002B0x32d/0x3f0 [69832.282082]  ? kthread_park\u002B0x170/0x170 [69832.282849]  ret_from_fork\u002B0x1f/0x30 [69832.283573] [69832.283886] Allocated by task 7725: [69832.284599]  kasan_save_stack\u002B0x19/0x40 [69832.285385]  __kasan_kmalloc.constprop.2\u002B0xc1/0xd0 [69832.286350]  kmem_cache_alloc_node\u002B0x13f/0x460 [69832.287237]  bfq_get_queue\u002B0x3d4/0x1140 [69832.287993]  bfq_get_bfqq_handle_split\u002B0x103/0x510 [69832.289015]  bfq_init_rq\u002B0x337/0x2d50 [69832.289749]  bfq_insert_requests\u002B0x304/0x4e10 [69832.290634]  blk_mq_sched_insert_requests\u002B0x13e/0x390 [69832.291629]  blk_mq_flush_plug_list\u002B0x4b4/0x760 [69832.292538]  blk_flush_plug_list\u002B0x2c5/0x480 [69832.293392]  io_schedule_prepare\u002B0xb2/0xd0 [69832.294209]  io_schedule_timeout\u002B0x13/0x80 [69832.295014]  wait_for_common_io.constprop.1\u002B0x13c/0x270 [69832.296137]  submit_bio_wait\u002B0x103/0x1a0 [69832.296932]  blkdev_issue_discard\u002B0xe6/0x160 [69832.297794]  blk_ioctl_discard\u002B0x219/0x290 [69832.298614]  blkdev_common_ioctl\u002B0x50a/0x1750 [69832.304715]  blkdev_ioctl\u002B0x470/0x600 [69832.305474]  block_ioctl\u002B0xde/0x120 [69832.306232]  vfs_ioctl\u002B0x6c/0xc0 [69832.306877]  __se_sys_ioctl\u002B0x90/0xa0 [69832.307629]  do_syscall_64\u002B0x2d/0x40 [69832.308362]  entry_SYSCALL_64_after_hwframe\u002B0x44/0xa9 [69832.309382] [69832.309701] Freed by task 155: [69832.310328]  kasan_save_stack\u002B0x19/0x40 [69832.311121]  kasan_set_track\u002B0x1c/0x30 [69832.311868]  kasan_set_free_info\u002B0x1b/0x30 [69832.312699]  __kasan_slab_free\u002B0x111/0x160 [69832.313524]  kmem_cache_free\u002B0x94/0x460 [69832.314367]  bfq_put_queue\u002B0x582/0x940 [69832.315112]  __bfq_bfqd_reset_in_service\u002B0x166/0x1d0 [69832.317275]  bfq_bfqq_expire\u002B0xb27/0x2440 [69832.318084]  bfq_dispatch_request\u002B0x697/0x44b0 [69832.318991]  __blk_mq_do_dispatch_sched\u002B0x52f/0x830 [69832.319984]  __blk_mq_sched_dispatch_requests\u002B0x398/0x4f0 [69832.321087]  blk_mq_sched_dispatch_requests\u002B0xdf/0x140 [69832.322225]  __blk_mq_run_hw_queue\u002B0xc0/0x270 [69832.323114]  blk_mq_run_work_fn\u002B0x51/0x6 ---truncated---",
  "published": "2025-02-26T07:00:54Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00277,
  "epssPercentile": 0.20247,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2022-49176",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49176",
      "released": "2025-02-26T07:00:54Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2022-49176",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49176",
      "released": "2025-02-26T07:00:54Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.17.3-1",
      "fix": "DEBIAN-CVE-2022-49176",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49176",
      "released": "2025-02-26T07:00:54Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}