CVE-2025-21943 (GCVE-0-2025-21943)
Vulnerability from cvelistv5
Published
2025-04-01 15:41
Modified
2025-05-04 07:25
Severity ?
VLAI Severity ?
EPSS score ?
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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"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"
}
}
},
"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": "2025-05-04T07:25:21.415Z",
"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\":\"2025-04-10T18:06:04.267\",\"vulnStatus\":\"Analyzed\",\"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}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"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\"]}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
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