CVE-2025-21943 (GCVE-0-2025-21943)
Vulnerability from cvelistv5
Published
2025-04-01 15:41
Modified
2025-10-01 17:17
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: gpio: aggregator: protect driver attr handlers against module unload Both new_device_store and delete_device_store touch module global resources (e.g. gpio_aggregator_lock). To prevent race conditions with module unload, a reference needs to be held. Add try_module_get() in these handlers. For new_device_store, this eliminates what appears to be the most dangerous scenario: if an id is allocated from gpio_aggregator_idr but platform_device_register has not yet been called or completed, a concurrent module unload could fail to unregister/delete the device, leaving behind a dangling platform device/GPIO forwarder. This can result in various issues. The following simple reproducer demonstrates these problems: #!/bin/bash while :; do # note: whether 'gpiochip0 0' exists or not does not matter. echo 'gpiochip0 0' > /sys/bus/platform/drivers/gpio-aggregator/new_device done & while :; do modprobe gpio-aggregator modprobe -r gpio-aggregator done & wait Starting with the following warning, several kinds of warnings will appear and the system may become unstable: ------------[ cut here ]------------ list_del corruption, ffff888103e2e980->next is LIST_POISON1 (dead000000000100) WARNING: CPU: 1 PID: 1327 at lib/list_debug.c:56 __list_del_entry_valid_or_report+0xa3/0x120 [...] RIP: 0010:__list_del_entry_valid_or_report+0xa3/0x120 [...] Call Trace: <TASK> ? __list_del_entry_valid_or_report+0xa3/0x120 ? __warn.cold+0x93/0xf2 ? __list_del_entry_valid_or_report+0xa3/0x120 ? report_bug+0xe6/0x170 ? __irq_work_queue_local+0x39/0xe0 ? handle_bug+0x58/0x90 ? exc_invalid_op+0x13/0x60 ? asm_exc_invalid_op+0x16/0x20 ? __list_del_entry_valid_or_report+0xa3/0x120 gpiod_remove_lookup_table+0x22/0x60 new_device_store+0x315/0x350 [gpio_aggregator] kernfs_fop_write_iter+0x137/0x1f0 vfs_write+0x262/0x430 ksys_write+0x60/0xd0 do_syscall_64+0x6c/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e [...] </TASK> ---[ end trace 0000000000000000 ]---
References
Impacted products
Vendor Product Version
Linux Linux Version: 828546e24280f721350a7a0dcc92416e917b4382
Version: 828546e24280f721350a7a0dcc92416e917b4382
Version: 828546e24280f721350a7a0dcc92416e917b4382
Version: 828546e24280f721350a7a0dcc92416e917b4382
Version: 828546e24280f721350a7a0dcc92416e917b4382
Version: 828546e24280f721350a7a0dcc92416e917b4382
Version: 828546e24280f721350a7a0dcc92416e917b4382
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{
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            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 4.7,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
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              "content": {
                "id": "CVE-2025-21943",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
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                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T17:17:38.478936Z",
                "version": "2.0.3"
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                "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
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                "type": "CWE"
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpio: aggregator: protect driver attr handlers against module unload\n\nBoth new_device_store and delete_device_store touch module global\nresources (e.g. gpio_aggregator_lock). To prevent race conditions with\nmodule unload, a reference needs to be held.\n\nAdd try_module_get() in these handlers.\n\nFor new_device_store, this eliminates what appears to be the most dangerous\nscenario: if an id is allocated from gpio_aggregator_idr but\nplatform_device_register has not yet been called or completed, a concurrent\nmodule unload could fail to unregister/delete the device, leaving behind a\ndangling platform device/GPIO forwarder. This can result in various issues.\nThe following simple reproducer demonstrates these problems:\n\n  #!/bin/bash\n  while :; do\n    # note: whether \u0027gpiochip0 0\u0027 exists or not does not matter.\n    echo \u0027gpiochip0 0\u0027 \u003e /sys/bus/platform/drivers/gpio-aggregator/new_device\n  done \u0026\n  while :; do\n    modprobe gpio-aggregator\n    modprobe -r gpio-aggregator\n  done \u0026\n  wait\n\n  Starting with the following warning, several kinds of warnings will appear\n  and the system may become unstable:\n\n  ------------[ cut here ]------------\n  list_del corruption, ffff888103e2e980-\u003enext is LIST_POISON1 (dead000000000100)\n  WARNING: CPU: 1 PID: 1327 at lib/list_debug.c:56 __list_del_entry_valid_or_report+0xa3/0x120\n  [...]\n  RIP: 0010:__list_del_entry_valid_or_report+0xa3/0x120\n  [...]\n  Call Trace:\n   \u003cTASK\u003e\n   ? __list_del_entry_valid_or_report+0xa3/0x120\n   ? __warn.cold+0x93/0xf2\n   ? __list_del_entry_valid_or_report+0xa3/0x120\n   ? report_bug+0xe6/0x170\n   ? __irq_work_queue_local+0x39/0xe0\n   ? handle_bug+0x58/0x90\n   ? exc_invalid_op+0x13/0x60\n   ? asm_exc_invalid_op+0x16/0x20\n   ? __list_del_entry_valid_or_report+0xa3/0x120\n   gpiod_remove_lookup_table+0x22/0x60\n   new_device_store+0x315/0x350 [gpio_aggregator]\n   kernfs_fop_write_iter+0x137/0x1f0\n   vfs_write+0x262/0x430\n   ksys_write+0x60/0xd0\n   do_syscall_64+0x6c/0x180\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   [...]\n   \u003c/TASK\u003e\n  ---[ end trace 0000000000000000 ]---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:25:21.415Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fd6aa1f8cbe0979eb66ac32ebc231bf0b10a2117"
        },
        {
          "url": "https://git.kernel.org/stable/c/807789018186cf508ceb3a1f8f02935cd195717b"
        },
        {
          "url": "https://git.kernel.org/stable/c/9334c88fc2fbc6836b307d269fcc1744c69701c0"
        },
        {
          "url": "https://git.kernel.org/stable/c/d99dc8f7ea01ee1b21306e0eda8eb18a4af80db6"
        },
        {
          "url": "https://git.kernel.org/stable/c/8fb07fb1bba91d45846ed8605c3097fe67a7d54c"
        },
        {
          "url": "https://git.kernel.org/stable/c/56281a76b805b5ac61feb5d580139695a22f87f0"
        },
        {
          "url": "https://git.kernel.org/stable/c/12f65d1203507f7db3ba59930fe29a3b8eee9945"
        }
      ],
      "title": "gpio: aggregator: protect driver attr handlers against module unload",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21943",
    "datePublished": "2025-04-01T15:41:07.463Z",
    "dateReserved": "2024-12-29T08:45:45.789Z",
    "dateUpdated": "2025-10-01T17:17:41.198Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-21943\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-04-01T16:15:25.400\",\"lastModified\":\"2025-10-01T18:15:38.577\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ngpio: aggregator: protect driver attr handlers against module unload\\n\\nBoth new_device_store and delete_device_store touch module global\\nresources (e.g. gpio_aggregator_lock). To prevent race conditions with\\nmodule unload, a reference needs to be held.\\n\\nAdd try_module_get() in these handlers.\\n\\nFor new_device_store, this eliminates what appears to be the most dangerous\\nscenario: if an id is allocated from gpio_aggregator_idr but\\nplatform_device_register has not yet been called or completed, a concurrent\\nmodule unload could fail to unregister/delete the device, leaving behind a\\ndangling platform device/GPIO forwarder. This can result in various issues.\\nThe following simple reproducer demonstrates these problems:\\n\\n  #!/bin/bash\\n  while :; do\\n    # note: whether \u0027gpiochip0 0\u0027 exists or not does not matter.\\n    echo \u0027gpiochip0 0\u0027 \u003e /sys/bus/platform/drivers/gpio-aggregator/new_device\\n  done \u0026\\n  while :; do\\n    modprobe gpio-aggregator\\n    modprobe -r gpio-aggregator\\n  done \u0026\\n  wait\\n\\n  Starting with the following warning, several kinds of warnings will appear\\n  and the system may become unstable:\\n\\n  ------------[ cut here ]------------\\n  list_del corruption, ffff888103e2e980-\u003enext is LIST_POISON1 (dead000000000100)\\n  WARNING: CPU: 1 PID: 1327 at lib/list_debug.c:56 __list_del_entry_valid_or_report+0xa3/0x120\\n  [...]\\n  RIP: 0010:__list_del_entry_valid_or_report+0xa3/0x120\\n  [...]\\n  Call Trace:\\n   \u003cTASK\u003e\\n   ? __list_del_entry_valid_or_report+0xa3/0x120\\n   ? __warn.cold+0x93/0xf2\\n   ? __list_del_entry_valid_or_report+0xa3/0x120\\n   ? report_bug+0xe6/0x170\\n   ? __irq_work_queue_local+0x39/0xe0\\n   ? handle_bug+0x58/0x90\\n   ? exc_invalid_op+0x13/0x60\\n   ? asm_exc_invalid_op+0x16/0x20\\n   ? __list_del_entry_valid_or_report+0xa3/0x120\\n   gpiod_remove_lookup_table+0x22/0x60\\n   new_device_store+0x315/0x350 [gpio_aggregator]\\n   kernfs_fop_write_iter+0x137/0x1f0\\n   vfs_write+0x262/0x430\\n   ksys_write+0x60/0xd0\\n   do_syscall_64+0x6c/0x180\\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n   [...]\\n   \u003c/TASK\u003e\\n  ---[ end trace 0000000000000000 ]---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: gpio: gregator: protege los controladores attr del controlador contra la descarga del m\u00f3dulo Tanto new_device_store como delete_device_store tocan los recursos globales del m\u00f3dulo (por ejemplo, gpio_aggregator_lock). Para evitar condiciones de ejecuci\u00f3n con la descarga del m\u00f3dulo, se debe mantener una referencia. Agregue try_module_get() en estos controladores. Para new_device_store, esto elimina lo que parece ser el escenario m\u00e1s peligroso: si se asigna un id desde gpio_aggregator_idr pero platform_device_register a\u00fan no se ha llamado o completado, una descarga de m\u00f3dulo concurrente podr\u00eda fallar al anular el registro/eliminar el dispositivo, dejando atr\u00e1s un reenv\u00edo de dispositivo de plataforma/GPIO colgante. Esto puede resultar en varios problemas. El siguiente reproductor simple demuestra estos problemas: #!/bin/bash while :; do # nota: no importa si \u0027gpiochip0 0\u0027 existe o no. echo \u0027gpiochip0 0\u0027 \u0026gt; /sys/bus/platform/drivers/gpio-aggregator/new_device done \u0026amp; while :; do modprobe gpio-aggregator modprobe -r gpio-aggregator done \u0026amp; wait A partir de la siguiente advertencia, aparecer\u00e1n varios tipos de advertencias y el sistema puede volverse inestable: ------------[ cortar aqu\u00ed ]------------ list_del corruption, ffff888103e2e980-\u0026gt;next is LIST_POISON1 (dead000000000100) WARNING: CPU: 1 PID: 1327 at lib/list_debug.c:56 __list_del_entry_valid_or_report+0xa3/0x120 [...] RIP: 0010:__list_del_entry_valid_or_report+0xa3/0x120 [...] Call Trace:  ? __list_del_entry_valid_or_report+0xa3/0x120 ? __warn.cold+0x93/0xf2 ? __list_del_entry_valid_or_report+0xa3/0x120 ? report_bug+0xe6/0x170 ? __irq_work_queue_local+0x39/0xe0 ? handle_bug+0x58/0x90 ? exc_invalid_op+0x13/0x60 ? asm_exc_invalid_op+0x16/0x20 ? __list_del_entry_valid_or_report+0xa3/0x120 gpiod_remove_lookup_table+0x22/0x60 new_device_store+0x315/0x350 [gpio_aggregator] kernfs_fop_write_iter+0x137/0x1f0 vfs_write+0x262/0x430 ksys_write+0x60/0xd0 do_syscall_64+0x6c/0x180 entry_SYSCALL_64_after_hwframe+0x76/0x7e [...]  ---[ fin de seguimiento 000000000000000 ]---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":3.6},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-362\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-362\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.8\",\"versionEndExcluding\":\"5.10.235\",\"matchCriteriaId\":\"17FFC38A-2679-443B-8BDB-D553D86D60EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.179\",\"matchCriteriaId\":\"C708062C-4E1B-465F-AE6D-C09C46400875\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.131\",\"matchCriteriaId\":\"BA9C2DE3-D37C-46C6-8DCD-2EE509456E0B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.83\",\"matchCriteriaId\":\"7D9F642F-6E05-4926-B0FE-62F95B7266BC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.19\",\"matchCriteriaId\":\"32865E5C-8AE1-4D3D-A64D-299039694A88\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.13.7\",\"matchCriteriaId\":\"842F5A44-3E71-4546-B4FD-43B0ACE3F32B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"186716B6-2B66-4BD0-852E-D48E71C0C85F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"0D3E781C-403A-498F-9DA9-ECEE50F41E75\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"66619FB8-0AAF-4166-B2CF-67B24143261D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"D3D6550E-6679-4560-902D-AF52DCFE905B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"45B90F6B-BEC7-4D4E-883A-9DBADE021750\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/12f65d1203507f7db3ba59930fe29a3b8eee9945\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/56281a76b805b5ac61feb5d580139695a22f87f0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/807789018186cf508ceb3a1f8f02935cd195717b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8fb07fb1bba91d45846ed8605c3097fe67a7d54c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9334c88fc2fbc6836b307d269fcc1744c69701c0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d99dc8f7ea01ee1b21306e0eda8eb18a4af80db6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fd6aa1f8cbe0979eb66ac32ebc231bf0b10a2117\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.7, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-21943\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T17:17:38.478936Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-362\", \"description\": \"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T14:38:10.353Z\"}}], \"cna\": {\"title\": \"gpio: aggregator: protect driver attr handlers against module unload\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"828546e24280f721350a7a0dcc92416e917b4382\", \"lessThan\": \"fd6aa1f8cbe0979eb66ac32ebc231bf0b10a2117\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"828546e24280f721350a7a0dcc92416e917b4382\", \"lessThan\": \"807789018186cf508ceb3a1f8f02935cd195717b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"828546e24280f721350a7a0dcc92416e917b4382\", \"lessThan\": \"9334c88fc2fbc6836b307d269fcc1744c69701c0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"828546e24280f721350a7a0dcc92416e917b4382\", \"lessThan\": \"d99dc8f7ea01ee1b21306e0eda8eb18a4af80db6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"828546e24280f721350a7a0dcc92416e917b4382\", \"lessThan\": \"8fb07fb1bba91d45846ed8605c3097fe67a7d54c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"828546e24280f721350a7a0dcc92416e917b4382\", \"lessThan\": \"56281a76b805b5ac61feb5d580139695a22f87f0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"828546e24280f721350a7a0dcc92416e917b4382\", \"lessThan\": \"12f65d1203507f7db3ba59930fe29a3b8eee9945\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/gpio/gpio-aggregator.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.235\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.179\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.131\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.83\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.19\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpio/gpio-aggregator.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/fd6aa1f8cbe0979eb66ac32ebc231bf0b10a2117\"}, {\"url\": \"https://git.kernel.org/stable/c/807789018186cf508ceb3a1f8f02935cd195717b\"}, {\"url\": \"https://git.kernel.org/stable/c/9334c88fc2fbc6836b307d269fcc1744c69701c0\"}, {\"url\": \"https://git.kernel.org/stable/c/d99dc8f7ea01ee1b21306e0eda8eb18a4af80db6\"}, {\"url\": \"https://git.kernel.org/stable/c/8fb07fb1bba91d45846ed8605c3097fe67a7d54c\"}, {\"url\": \"https://git.kernel.org/stable/c/56281a76b805b5ac61feb5d580139695a22f87f0\"}, {\"url\": \"https://git.kernel.org/stable/c/12f65d1203507f7db3ba59930fe29a3b8eee9945\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ngpio: aggregator: protect driver attr handlers against module unload\\n\\nBoth new_device_store and delete_device_store touch module global\\nresources (e.g. gpio_aggregator_lock). To prevent race conditions with\\nmodule unload, a reference needs to be held.\\n\\nAdd try_module_get() in these handlers.\\n\\nFor new_device_store, this eliminates what appears to be the most dangerous\\nscenario: if an id is allocated from gpio_aggregator_idr but\\nplatform_device_register has not yet been called or completed, a concurrent\\nmodule unload could fail to unregister/delete the device, leaving behind a\\ndangling platform device/GPIO forwarder. This can result in various issues.\\nThe following simple reproducer demonstrates these problems:\\n\\n  #!/bin/bash\\n  while :; do\\n    # note: whether \u0027gpiochip0 0\u0027 exists or not does not matter.\\n    echo \u0027gpiochip0 0\u0027 \u003e /sys/bus/platform/drivers/gpio-aggregator/new_device\\n  done \u0026\\n  while :; do\\n    modprobe gpio-aggregator\\n    modprobe -r gpio-aggregator\\n  done \u0026\\n  wait\\n\\n  Starting with the following warning, several kinds of warnings will appear\\n  and the system may become unstable:\\n\\n  ------------[ cut here ]------------\\n  list_del corruption, ffff888103e2e980-\u003enext is LIST_POISON1 (dead000000000100)\\n  WARNING: CPU: 1 PID: 1327 at lib/list_debug.c:56 __list_del_entry_valid_or_report+0xa3/0x120\\n  [...]\\n  RIP: 0010:__list_del_entry_valid_or_report+0xa3/0x120\\n  [...]\\n  Call Trace:\\n   \u003cTASK\u003e\\n   ? __list_del_entry_valid_or_report+0xa3/0x120\\n   ? __warn.cold+0x93/0xf2\\n   ? __list_del_entry_valid_or_report+0xa3/0x120\\n   ? report_bug+0xe6/0x170\\n   ? __irq_work_queue_local+0x39/0xe0\\n   ? handle_bug+0x58/0x90\\n   ? exc_invalid_op+0x13/0x60\\n   ? asm_exc_invalid_op+0x16/0x20\\n   ? __list_del_entry_valid_or_report+0xa3/0x120\\n   gpiod_remove_lookup_table+0x22/0x60\\n   new_device_store+0x315/0x350 [gpio_aggregator]\\n   kernfs_fop_write_iter+0x137/0x1f0\\n   vfs_write+0x262/0x430\\n   ksys_write+0x60/0xd0\\n   do_syscall_64+0x6c/0x180\\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n   [...]\\n   \u003c/TASK\u003e\\n  ---[ end trace 0000000000000000 ]---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.235\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.179\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.131\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.83\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.19\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.7\", \"versionStartIncluding\": \"5.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14\", \"versionStartIncluding\": \"5.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:25:21.415Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21943\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T17:17:41.198Z\", \"dateReserved\": \"2024-12-29T08:45:45.789Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-04-01T15:41:07.463Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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