dm thin: fix use-after-free crash in dm_sm_register_threshold_callback

{
  "id": "3a5bc8bf38077bba94d01c164cd31a35b407b1f8013a294e183564065fe38998",
  "url": "https://osv.dev/vulnerability/CVE-2022-50092",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "dm thin: fix use-after-free crash in dm_sm_register_threshold_callback",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: dm thin: fix use-after-free crash in dm_sm_register_threshold_callback Fault inject on pool metadata device reports: BUG: KASAN: use-after-free in dm_pool_register_metadata_threshold+0x40/0x80 Read of size 8 at addr ffff8881b9d50068 by task dmsetup/950 CPU: 7 PID: 950 Comm: dmsetup Tainted: G W 5.19.0-rc6 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014 Call Trace: dump_stack_lvl+0x34/0x44 print_address_description.constprop.0.cold+0xeb/0x3f4 kasan_report.cold+0xe6/0x147 dm_pool_register_metadata_threshold+0x40/0x80 pool_ctr+0xa0a/0x1150 dm_table_add_target+0x2c8/0x640 table_load+0x1fd/0x430 ctl_ioctl+0x2c4/0x5a0 dm_ctl_ioctl+0xa/0x10 __x64_sys_ioctl+0xb3/0xd0 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 This can be easily reproduced using: echo offline > /sys/block/sda/device/state dd if=/dev/zero of=/dev/mapper/thin bs=4k count=10 dmsetup load pool --table \"0 20971520 thin-pool /dev/sda /dev/sdb 128 0 0\" If a metadata commit fails, the transaction will be aborted and the metadata space maps will be destroyed. If a DM table reload then happens for this failed thin-pool, a use-after-free will occur in dm_sm_register_threshold_callback (called from dm_pool_register_metadata_threshold). Fix this by in dm_pool_register_metadata_threshold() by returning the -EINVAL error if the thin-pool is in fail mode. Also fail pool_ctr() with a new error message: \"Err",
    "evidence": "osv:CVE-2022-50092",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.211",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.137",
            "evidence": "/affected/1/ranges"
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          {
            "value": "5.15.61",
            "evidence": "/affected/1/ranges"
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          {
            "value": "5.18.18",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.19.2",
            "evidence": "/affected/1/ranges"
          }
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        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-50092",
      "aliases": [
        "CVE-2022-50092"
      ],
      "affected": [
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                  "fixed": "1a199fa9217d28511ff88529238fd9980ea64cf3"
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                {
                  "fixed": "e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790"
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      ],
      "modified": "2026-10-28T02:30:21.075218378Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/05cef0999b3208b5a6ede1bfac855139e4de55ef",
        "https://git.kernel.org/stable/c/1a199fa9217d28511ff88529238fd9980ea64cf3",
        "https://git.kernel.org/stable/c/3534e5a5ed2997ca1b00f44a0378a075bd05e8a3",
        "https://git.kernel.org/stable/c/5e2cf705155a1514be3c96ea664a9cd356998ee7",
        "https://git.kernel.org/stable/c/e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790",
        "https://git.kernel.org/stable/c/f83131a3071a0b61a4d7dca70f95adb3ffad920e",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50092.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-50092",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50092.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-50092",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 487025,
  "published_at": "2025-06-18T11:02:31.372+00:00"
}