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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-2022-49179",
      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\nblock, bfq: don't move oom_bfqq\nOur test report a UAF:\n[ 2073.019181] ==================================================================\n[ 2073.019188] BUG: KASAN: use-after-free in __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019191] Write of size 8 at addr ffff8000ccf64128 by task rmmod/72584\n[ 2073.019192]\n[ 2073.019196] CPU: 0 PID: 72584 Comm: rmmod Kdump: loaded Not tainted 4.19.90-yk #5\n[ 2073.019198] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\n[ 2073.019200] Call trace:\n[ 2073.019203]  dump_backtrace+0x0/0x310\n[ 2073.019206]  show_stack+0x28/0x38\n[ 2073.019210]  dump_stack+0xec/0x15c\n[ 2073.019216]  print_address_description+0x68/0x2d0\n[ 2073.019220]  kasan_report+0x238/0x2f0\n[ 2073.019224]  __asan_store8+0x88/0xb0\n[ 2073.019229]  __bfq_put_async_bfqq+0xa0/0x168\n[ 2073.019233]  bfq_put_async_queues+0xbc/0x208\n[ 2073.019236]  bfq_pd_offline+0x178/0x238\n[ 2073.019240]  blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019244]  bfq_exit_queue+0x128/0x178\n[ 2073.019249]  blk_mq_exit_sched+0x12c/0x160\n[ 2073.019252]  elevator_exit+0xc8/0xd0\n[ 2073.019256]  blk_exit_queue+0x50/0x88\n[ 2073.019259]  blk_cleanup_queue+0x228/0x3d8\n[ 2073.019267]  null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019274]  null_exit+0x90/0x114 [null_blk]\n[ 2073.019278]  __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019282]  el0_svc_common+0xc8/0x320\n[ 2073.019287]  el0_svc_handler+0xf8/0x160\n[ 2073.019290]  el0_svc+0x10/0x218\n[ 2073.019291]\n[ 2073.019294] Allocated by task 14163:\n[ 2073.019301]  kasan_kmalloc+0xe0/0x190\n[ 2073.019305]  kmem_cache_alloc_node_trace+0x1cc/0x418\n[ 2073.019308]  bfq_pd_alloc+0x54/0x118\n[ 2073.019313]  blkcg_activate_policy+0x250/0x460\n[ 2073.019317]  bfq_create_group_hierarchy+0x38/0x110\n[ 2073.019321]  bfq_init_queue+0x6d0/0x948\n[ 2073.019325]  blk_mq_init_sched+0x1d8/0x390\n[ 2073.019330]  elevator_switch_mq+0x88/0x170\n[ 2073.019334]  elevator_switch+0x140/0x270\n[ 2073.019338]  elv_iosched_store+0x1a4/0x2a0\n[ 2073.019342]  queue_attr_store+0x90/0xe0\n[ 2073.019348]  sysfs_kf_write+0xa8/0xe8\n[ 2073.019351]  kernfs_fop_write+0x1f8/0x378\n[ 2073.019359]  __vfs_write+0xe0/0x360\n[ 2073.019363]  vfs_write+0xf0/0x270\n[ 2073.019367]  ksys_write+0xdc/0x1b8\n[ 2073.019371]  __arm64_sys_write+0x50/0x60\n[ 2073.019375]  el0_svc_common+0xc8/0x320\n[ 2073.019380]  el0_svc_handler+0xf8/0x160\n[ 2073.019383]  el0_svc+0x10/0x218\n[ 2073.019385]\n[ 2073.019387] Freed by task 72584:\n[ 2073.019391]  __kasan_slab_free+0x120/0x228\n[ 2073.019394]  kasan_slab_free+0x10/0x18\n[ 2073.019397]  kfree+0x94/0x368\n[ 2073.019400]  bfqg_put+0x64/0xb0\n[ 2073.019404]  bfqg_and_blkg_put+0x90/0xb0\n[ 2073.019408]  bfq_put_queue+0x220/0x228\n[ 2073.019413]  __bfq_put_async_bfqq+0x98/0x168\n[ 2073.019416]  bfq_put_async_queues+0xbc/0x208\n[ 2073.019420]  bfq_pd_offline+0x178/0x238\n[ 2073.019424]  blkcg_deactivate_policy+0x1f0/0x420\n[ 2073.019429]  bfq_exit_queue+0x128/0x178\n[ 2073.019433]  blk_mq_exit_sched+0x12c/0x160\n[ 2073.019437]  elevator_exit+0xc8/0xd0\n[ 2073.019440]  blk_exit_queue+0x50/0x88\n[ 2073.019443]  blk_cleanup_queue+0x228/0x3d8\n[ 2073.019451]  null_del_dev+0xfc/0x1e0 [null_blk]\n[ 2073.019459]  null_exit+0x90/0x114 [null_blk]\n[ 2073.019462]  __arm64_sys_delete_module+0x358/0x5a0\n[ 2073.019467]  el0_svc_common+0xc8/0x320\n[ 2073.019471]  el0_svc_handler+0xf8/0x160\n[ 2073.019474]  el0_svc+0x10/0x218\n[ 2073.019475]\n[ 2073.019479] The buggy address belongs to the object at ffff8000ccf63f00\nwhich belongs to the cache kmalloc-1024 of size 1024\n[ 2073.019484] The buggy address is located 552 bytes inside of\n1024-byte region [ffff8000ccf63f00, ffff8000ccf64300)\n[ 2073.019486] The buggy address belongs to the page:\n[ 2073.019492] page:ffff7e000333d800 count:1 mapcount:0 mapping:ffff8000c0003a00 index:0x0 compound_mapcount: 0\n[ 2073.020123] flags: 0x7ffff0000008100(slab|head)\n[ 2073.020403] raw: 07ffff0000008100 ffff7e0003334c08 ffff7e00001f5a08 ffff8000c0003a00\n[ 2073.020409] ra\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-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-2022-49179"
        }
      ],
      "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"
          },
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      "threats": [
        {
          "category": "impact",
          "details": "Medium"
        }
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}