CVE-2022-50092 (GCVE-0-2022-50092)
Vulnerability from cvelistv5
Published
2025-06-18 11:02
Modified
2025-06-18 11:02
Severity ?
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: <TASK> 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: "Error registering metadata threshold".
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/05cef0999b3208b5a6ede1bfac855139e4de55ef
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1a199fa9217d28511ff88529238fd9980ea64cf3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3534e5a5ed2997ca1b00f44a0378a075bd05e8a3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5e2cf705155a1514be3c96ea664a9cd356998ee7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f83131a3071a0b61a4d7dca70f95adb3ffad920e
Impacted products
Vendor Product Version
Linux Linux Version: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e
Version: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e
Version: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e
Version: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e
Version: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e
Version: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-thin-metadata.c",
            "drivers/md/dm-thin.c"
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          "programFiles": [
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            "drivers/md/dm-thin.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "version": "6.0",
              "versionType": "original_commit_for_fix"
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          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm thin: fix use-after-free crash in dm_sm_register_threshold_callback\n\nFault inject on pool metadata device reports:\n  BUG: KASAN: use-after-free in dm_pool_register_metadata_threshold+0x40/0x80\n  Read of size 8 at addr ffff8881b9d50068 by task dmsetup/950\n\n  CPU: 7 PID: 950 Comm: dmsetup Tainted: G        W         5.19.0-rc6 #1\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x34/0x44\n   print_address_description.constprop.0.cold+0xeb/0x3f4\n   kasan_report.cold+0xe6/0x147\n   dm_pool_register_metadata_threshold+0x40/0x80\n   pool_ctr+0xa0a/0x1150\n   dm_table_add_target+0x2c8/0x640\n   table_load+0x1fd/0x430\n   ctl_ioctl+0x2c4/0x5a0\n   dm_ctl_ioctl+0xa/0x10\n   __x64_sys_ioctl+0xb3/0xd0\n   do_syscall_64+0x35/0x80\n   entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nThis can be easily reproduced using:\n  echo offline \u003e /sys/block/sda/device/state\n  dd if=/dev/zero of=/dev/mapper/thin bs=4k count=10\n  dmsetup load pool --table \"0 20971520 thin-pool /dev/sda /dev/sdb 128 0 0\"\n\nIf a metadata commit fails, the transaction will be aborted and the\nmetadata space maps will be destroyed. If a DM table reload then\nhappens for this failed thin-pool, a use-after-free will occur in\ndm_sm_register_threshold_callback (called from\ndm_pool_register_metadata_threshold).\n\nFix this by in dm_pool_register_metadata_threshold() by returning the\n-EINVAL error if the thin-pool is in fail mode. Also fail pool_ctr()\nwith a new error message: \"Error registering metadata threshold\"."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:02:31.372Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/05cef0999b3208b5a6ede1bfac855139e4de55ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/5e2cf705155a1514be3c96ea664a9cd356998ee7"
        },
        {
          "url": "https://git.kernel.org/stable/c/f83131a3071a0b61a4d7dca70f95adb3ffad920e"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a199fa9217d28511ff88529238fd9980ea64cf3"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790"
        },
        {
          "url": "https://git.kernel.org/stable/c/3534e5a5ed2997ca1b00f44a0378a075bd05e8a3"
        }
      ],
      "title": "dm thin: fix use-after-free crash in dm_sm_register_threshold_callback",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50092",
    "datePublished": "2025-06-18T11:02:31.372Z",
    "dateReserved": "2025-06-18T10:57:27.411Z",
    "dateUpdated": "2025-06-18T11:02:31.372Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50092\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:38.383\",\"lastModified\":\"2025-06-18T13:47:40.833\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndm thin: fix use-after-free crash in dm_sm_register_threshold_callback\\n\\nFault inject on pool metadata device reports:\\n  BUG: KASAN: use-after-free in dm_pool_register_metadata_threshold+0x40/0x80\\n  Read of size 8 at addr ffff8881b9d50068 by task dmsetup/950\\n\\n  CPU: 7 PID: 950 Comm: dmsetup Tainted: G        W         5.19.0-rc6 #1\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014\\n  Call Trace:\\n   \u003cTASK\u003e\\n   dump_stack_lvl+0x34/0x44\\n   print_address_description.constprop.0.cold+0xeb/0x3f4\\n   kasan_report.cold+0xe6/0x147\\n   dm_pool_register_metadata_threshold+0x40/0x80\\n   pool_ctr+0xa0a/0x1150\\n   dm_table_add_target+0x2c8/0x640\\n   table_load+0x1fd/0x430\\n   ctl_ioctl+0x2c4/0x5a0\\n   dm_ctl_ioctl+0xa/0x10\\n   __x64_sys_ioctl+0xb3/0xd0\\n   do_syscall_64+0x35/0x80\\n   entry_SYSCALL_64_after_hwframe+0x46/0xb0\\n\\nThis can be easily reproduced using:\\n  echo offline \u003e /sys/block/sda/device/state\\n  dd if=/dev/zero of=/dev/mapper/thin bs=4k count=10\\n  dmsetup load pool --table \\\"0 20971520 thin-pool /dev/sda /dev/sdb 128 0 0\\\"\\n\\nIf a metadata commit fails, the transaction will be aborted and the\\nmetadata space maps will be destroyed. If a DM table reload then\\nhappens for this failed thin-pool, a use-after-free will occur in\\ndm_sm_register_threshold_callback (called from\\ndm_pool_register_metadata_threshold).\\n\\nFix this by in dm_pool_register_metadata_threshold() by returning the\\n-EINVAL error if the thin-pool is in fail mode. Also fail pool_ctr()\\nwith a new error message: \\\"Error registering metadata threshold\\\".\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/05cef0999b3208b5a6ede1bfac855139e4de55ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1a199fa9217d28511ff88529238fd9980ea64cf3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3534e5a5ed2997ca1b00f44a0378a075bd05e8a3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5e2cf705155a1514be3c96ea664a9cd356998ee7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f83131a3071a0b61a4d7dca70f95adb3ffad920e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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