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        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
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  "vulnerabilities": [
    {
      "cve": "CVE-2022-49176",
      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\nbfq: fix use-after-free in bfq_dispatch_request\nKASAN reports a use-after-free report when doing normal scsi-mq test\n[69832.239032] ==================================================================\n[69832.241810] BUG: KASAN: use-after-free in bfq_dispatch_request+0x1045/0x44b0\n[69832.243267] Read of size 8 at addr ffff88802622ba88 by task kworker/3:1H/155\n[69832.244656]\n[69832.245007] CPU: 3 PID: 155 Comm: kworker/3:1H Not tainted 5.10.0-10295-g576c6382529e #8\n[69832.246626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\n[69832.249069] Workqueue: kblockd blk_mq_run_work_fn\n[69832.250022] Call Trace:\n[69832.250541]  dump_stack+0x9b/0xce\n[69832.251232]  ? bfq_dispatch_request+0x1045/0x44b0\n[69832.252243]  print_address_description.constprop.6+0x3e/0x60\n[69832.253381]  ? __cpuidle_text_end+0x5/0x5\n[69832.254211]  ? vprintk_func+0x6b/0x120\n[69832.254994]  ? bfq_dispatch_request+0x1045/0x44b0\n[69832.255952]  ? bfq_dispatch_request+0x1045/0x44b0\n[69832.256914]  kasan_report.cold.9+0x22/0x3a\n[69832.257753]  ? bfq_dispatch_request+0x1045/0x44b0\n[69832.258755]  check_memory_region+0x1c1/0x1e0\n[69832.260248]  bfq_dispatch_request+0x1045/0x44b0\n[69832.261181]  ? bfq_bfqq_expire+0x2440/0x2440\n[69832.262032]  ? blk_mq_delay_run_hw_queues+0xf9/0x170\n[69832.263022]  __blk_mq_do_dispatch_sched+0x52f/0x830\n[69832.264011]  ? blk_mq_sched_request_inserted+0x100/0x100\n[69832.265101]  __blk_mq_sched_dispatch_requests+0x398/0x4f0\n[69832.266206]  ? blk_mq_do_dispatch_ctx+0x570/0x570\n[69832.267147]  ? __switch_to+0x5f4/0xee0\n[69832.267898]  blk_mq_sched_dispatch_requests+0xdf/0x140\n[69832.268946]  __blk_mq_run_hw_queue+0xc0/0x270\n[69832.269840]  blk_mq_run_work_fn+0x51/0x60\n[69832.278170]  process_one_work+0x6d4/0xfe0\n[69832.278984]  worker_thread+0x91/0xc80\n[69832.279726]  ? __kthread_parkme+0xb0/0x110\n[69832.280554]  ? process_one_work+0xfe0/0xfe0\n[69832.281414]  kthread+0x32d/0x3f0\n[69832.282082]  ? kthread_park+0x170/0x170\n[69832.282849]  ret_from_fork+0x1f/0x30\n[69832.283573]\n[69832.283886] Allocated by task 7725:\n[69832.284599]  kasan_save_stack+0x19/0x40\n[69832.285385]  __kasan_kmalloc.constprop.2+0xc1/0xd0\n[69832.286350]  kmem_cache_alloc_node+0x13f/0x460\n[69832.287237]  bfq_get_queue+0x3d4/0x1140\n[69832.287993]  bfq_get_bfqq_handle_split+0x103/0x510\n[69832.289015]  bfq_init_rq+0x337/0x2d50\n[69832.289749]  bfq_insert_requests+0x304/0x4e10\n[69832.290634]  blk_mq_sched_insert_requests+0x13e/0x390\n[69832.291629]  blk_mq_flush_plug_list+0x4b4/0x760\n[69832.292538]  blk_flush_plug_list+0x2c5/0x480\n[69832.293392]  io_schedule_prepare+0xb2/0xd0\n[69832.294209]  io_schedule_timeout+0x13/0x80\n[69832.295014]  wait_for_common_io.constprop.1+0x13c/0x270\n[69832.296137]  submit_bio_wait+0x103/0x1a0\n[69832.296932]  blkdev_issue_discard+0xe6/0x160\n[69832.297794]  blk_ioctl_discard+0x219/0x290\n[69832.298614]  blkdev_common_ioctl+0x50a/0x1750\n[69832.304715]  blkdev_ioctl+0x470/0x600\n[69832.305474]  block_ioctl+0xde/0x120\n[69832.306232]  vfs_ioctl+0x6c/0xc0\n[69832.306877]  __se_sys_ioctl+0x90/0xa0\n[69832.307629]  do_syscall_64+0x2d/0x40\n[69832.308362]  entry_SYSCALL_64_after_hwframe+0x44/0xa9\n[69832.309382]\n[69832.309701] Freed by task 155:\n[69832.310328]  kasan_save_stack+0x19/0x40\n[69832.311121]  kasan_set_track+0x1c/0x30\n[69832.311868]  kasan_set_free_info+0x1b/0x30\n[69832.312699]  __kasan_slab_free+0x111/0x160\n[69832.313524]  kmem_cache_free+0x94/0x460\n[69832.314367]  bfq_put_queue+0x582/0x940\n[69832.315112]  __bfq_bfqd_reset_in_service+0x166/0x1d0\n[69832.317275]  bfq_bfqq_expire+0xb27/0x2440\n[69832.318084]  bfq_dispatch_request+0x697/0x44b0\n[69832.318991]  __blk_mq_do_dispatch_sched+0x52f/0x830\n[69832.319984]  __blk_mq_sched_dispatch_requests+0x398/0x4f0\n[69832.321087]  blk_mq_sched_dispatch_requests+0xdf/0x140\n[69832.322225]  __blk_mq_run_hw_queue+0xc0/0x270\n[69832.323114]  blk_mq_run_work_fn+0x51/0x6\n---truncated---",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
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          "Ubuntu-18:linux-doc-0:4.15.0-251.262.all",
          "Ubuntu-18:linux-libc-dev-0:4.15.0-251.262.amd64",
          "Ubuntu-18:linux-buildinfo-4.15.0-251-tuxcare.els39-lowlatency-0:4.15.0-251.262.amd64",
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          "Ubuntu-18:linux-headers-4.15.0-251-tuxcare.els39-0:4.15.0-251.262.all",
          "Ubuntu-18:linux-image-unsigned-4.15.0-251-tuxcare.els39-generic-0:4.15.0-251.262.amd64",
          "Ubuntu-18:linux-modules-4.15.0-251-tuxcare.els39-lowlatency-0:4.15.0-251.262.amd64",
          "Ubuntu-18:linux-cloud-tools-common-0:4.15.0-251.262.all",
          "Ubuntu-18:linux-cloud-tools-4.15.0-251-tuxcare.els39-lowlatency-0:4.15.0-251.262.amd64",
          "Ubuntu-18:linux-cloud-tools-4.15.0-251-tuxcare.els39-0:4.15.0-251.262.amd64",
          "Ubuntu-18:linux-source-4.15.0-0:4.15.0-251.262.all",
          "Ubuntu-18:linux-modules-4.15.0-251-tuxcare.els39-generic-0:4.15.0-251.262.amd64",
          "Ubuntu-18:linux-tools-common-0:4.15.0-251.262.all",
          "Ubuntu-18:linux-cloud-tools-4.15.0-251-tuxcare.els39-generic-0:4.15.0-251.262.amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2022-49176"
        }
      ],
      "release_date": "2025-02-26T00:00:00",
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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      "threats": [
        {
          "category": "impact",
          "details": "Medium"
        }
      ]
    }
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}