CVE-2022-50092 (GCVE-0-2022-50092)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:02 – Updated: 2026-05-11 19:12
VLAI?
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: <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".
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e , < 05cef0999b3208b5a6ede1bfac855139e4de55ef (git)
Affected: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e , < 5e2cf705155a1514be3c96ea664a9cd356998ee7 (git)
Affected: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e , < f83131a3071a0b61a4d7dca70f95adb3ffad920e (git)
Affected: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e , < 1a199fa9217d28511ff88529238fd9980ea64cf3 (git)
Affected: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e , < e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790 (git)
Affected: ac8c3f3df65e487bbcabf274eeeb9cd222f5da1e , < 3534e5a5ed2997ca1b00f44a0378a075bd05e8a3 (git)
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Linux Linux Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 5.4.211 , ≤ 5.4.* (semver)
Unaffected: 5.10.137 , ≤ 5.10.* (semver)
Unaffected: 5.15.61 , ≤ 5.15.* (semver)
Unaffected: 5.18.18 , ≤ 5.18.* (semver)
Unaffected: 5.19.2 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
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        {
          "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\"."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:12:40.591Z",
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          "url": "https://git.kernel.org/stable/c/5e2cf705155a1514be3c96ea664a9cd356998ee7"
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          "url": "https://git.kernel.org/stable/c/3534e5a5ed2997ca1b00f44a0378a075bd05e8a3"
        }
      ],
      "title": "dm thin: fix use-after-free crash in dm_sm_register_threshold_callback",
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    "cveId": "CVE-2022-50092",
    "datePublished": "2025-06-18T11:02:31.372Z",
    "dateReserved": "2025-06-18T10:57:27.411Z",
    "dateUpdated": "2026-05-11T19:12:40.591Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50092\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:38.383\",\"lastModified\":\"2025-11-18T02:50:03.477\",\"vulnStatus\":\"Analyzed\",\"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\\\".\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: dm thin: correcci\u00f3n del fallo de uso tras liberaci\u00f3n en dm_sm_register_threshold_callback Se informa de un fallo por inyecci\u00f3n en el dispositivo de metadatos del grupo: ERROR: KASAN: uso tras liberaci\u00f3n en dm_pool_register_metadata_threshold+0x40/0x80 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff8881b9d50068 por la tarea dmsetup/950 CPU: 7 PID: 950 Comm: dmsetup Contaminado: GW 5.19.0-rc6 #1 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 01/04/2014 Rastreo de llamadas:  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 Esto se puede reproducir f\u00e1cilmente usando: echo offline \u0026gt; /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\\\" Si falla una confirmaci\u00f3n de metadatos, la transacci\u00f3n se cancelar\u00e1 y los mapas de espacio de metadatos se destruir\u00e1n. Si se recarga la tabla DM para este thin-pool fallido, se ejecutar\u00e1 un \\\"use after-free\\\" en dm_sm_register_threshold_callback (llamado desde dm_pool_register_metadata_threshold). Solucione esto en dm_pool_register_metadata_threshold() devolviendo el error -EINVAL si el thin-pool est\u00e1 en modo de fallo. Tambi\u00e9n se produce un error en pool_ctr() con un nuevo mensaje de error: \\\"Error al registrar el umbral de metadatos\\\".\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.10\",\"versionEndExcluding\":\"5.4.211\",\"matchCriteriaId\":\"A7F6121D-9871-4870-B5CF-93C2A1147348\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.137\",\"matchCriteriaId\":\"C2BF720F-C5EE-4DE2-9BDF-CE4CFBC767F4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.61\",\"matchCriteriaId\":\"51861563-7F40-460F-82CD-2D3FBDAD6618\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.18.18\",\"matchCriteriaId\":\"5B42E453-8837-49D0-A5EF-03F818A6DC11\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.19\",\"versionEndExcluding\":\"5.19.2\",\"matchCriteriaId\":\"A1A2A5A5-4598-4D7E-BA07-4660398D6C8F\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/05cef0999b3208b5a6ede1bfac855139e4de55ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1a199fa9217d28511ff88529238fd9980ea64cf3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3534e5a5ed2997ca1b00f44a0378a075bd05e8a3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5e2cf705155a1514be3c96ea664a9cd356998ee7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e4dbe24f4bfd8377e7ba79fdcdb7c4d6eb1c6790\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f83131a3071a0b61a4d7dca70f95adb3ffad920e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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