gsd-2023-52609
Vulnerability from gsd
Modified
2024-03-07 06:01
Details
In the Linux kernel, the following vulnerability has been resolved:
binder: fix race between mmput() and do_exit()
Task A calls binder_update_page_range() to allocate and insert pages on
a remote address space from Task B. For this, Task A pins the remote mm
via mmget_not_zero() first. This can race with Task B do_exit() and the
final mmput() refcount decrement will come from Task A.
Task A | Task B
------------------+------------------
mmget_not_zero() |
| do_exit()
| exit_mm()
| mmput()
mmput() |
exit_mmap() |
remove_vma() |
fput() |
In this case, the work of ____fput() from Task B is queued up in Task A
as TWA_RESUME. So in theory, Task A returns to userspace and the cleanup
work gets executed. However, Task A instead sleep, waiting for a reply
from Task B that never comes (it's dead).
This means the binder_deferred_release() is blocked until an unrelated
binder event forces Task A to go back to userspace. All the associated
death notifications will also be delayed until then.
In order to fix this use mmput_async() that will schedule the work in
the corresponding mm->async_put_work WQ instead of Task A.
Aliases
{
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
"osvSchema": {
"aliases": [
"CVE-2023-52609"
],
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix race between mmput() and do_exit()\n\nTask A calls binder_update_page_range() to allocate and insert pages on\na remote address space from Task B. For this, Task A pins the remote mm\nvia mmget_not_zero() first. This can race with Task B do_exit() and the\nfinal mmput() refcount decrement will come from Task A.\n\n Task A | Task B\n ------------------+------------------\n mmget_not_zero() |\n | do_exit()\n | exit_mm()\n | mmput()\n mmput() |\n exit_mmap() |\n remove_vma() |\n fput() |\n\nIn this case, the work of ____fput() from Task B is queued up in Task A\nas TWA_RESUME. So in theory, Task A returns to userspace and the cleanup\nwork gets executed. However, Task A instead sleep, waiting for a reply\nfrom Task B that never comes (it\u0027s dead).\n\nThis means the binder_deferred_release() is blocked until an unrelated\nbinder event forces Task A to go back to userspace. All the associated\ndeath notifications will also be delayed until then.\n\nIn order to fix this use mmput_async() that will schedule the work in\nthe corresponding mm-\u003easync_put_work WQ instead of Task A.",
"id": "GSD-2023-52609",
"modified": "2024-03-07T06:01:45.401074Z",
"schema_version": "1.4.0"
}
},
"namespaces": {
"cve.org": {
"CVE_data_meta": {
"ASSIGNER": "cve@kernel.org",
"ID": "CVE-2023-52609",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Linux",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_name": "457b9a6f09f0",
"version_value": "95b1d336b064"
},
{
"version_value": "not down converted",
"x_cve_json_5_version_data": {
"defaultStatus": "affected",
"versions": [
{
"status": "affected",
"version": "2.6.29"
},
{
"lessThan": "2.6.29",
"status": "unaffected",
"version": "0",
"versionType": "custom"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.306",
"versionType": "custom"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.268",
"versionType": "custom"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.209",
"versionType": "custom"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.148",
"versionType": "custom"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.75",
"versionType": "custom"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.14",
"versionType": "custom"
},
{
"lessThanOrEqual": "6.7.*",
"status": "unaffected",
"version": "6.7.2",
"versionType": "custom"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.8",
"versionType": "original_commit_for_fix"
}
]
}
}
]
}
}
]
},
"vendor_name": "Linux"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix race between mmput() and do_exit()\n\nTask A calls binder_update_page_range() to allocate and insert pages on\na remote address space from Task B. For this, Task A pins the remote mm\nvia mmget_not_zero() first. This can race with Task B do_exit() and the\nfinal mmput() refcount decrement will come from Task A.\n\n Task A | Task B\n ------------------+------------------\n mmget_not_zero() |\n | do_exit()\n | exit_mm()\n | mmput()\n mmput() |\n exit_mmap() |\n remove_vma() |\n fput() |\n\nIn this case, the work of ____fput() from Task B is queued up in Task A\nas TWA_RESUME. So in theory, Task A returns to userspace and the cleanup\nwork gets executed. However, Task A instead sleep, waiting for a reply\nfrom Task B that never comes (it\u0027s dead).\n\nThis means the binder_deferred_release() is blocked until an unrelated\nbinder event forces Task A to go back to userspace. All the associated\ndeath notifications will also be delayed until then.\n\nIn order to fix this use mmput_async() that will schedule the work in\nthe corresponding mm-\u003easync_put_work WQ instead of Task A."
}
]
},
"generator": {
"engine": "bippy-8df59b4913de"
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "n/a"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://git.kernel.org/stable/c/95b1d336b0642198b56836b89908d07b9a0c9608",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/95b1d336b0642198b56836b89908d07b9a0c9608"
},
{
"name": "https://git.kernel.org/stable/c/252a2a5569eb9f8d16428872cc24dea1ac0bb097",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/252a2a5569eb9f8d16428872cc24dea1ac0bb097"
},
{
"name": "https://git.kernel.org/stable/c/7e7a0d86542b0ea903006d3f42f33c4f7ead6918",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/7e7a0d86542b0ea903006d3f42f33c4f7ead6918"
},
{
"name": "https://git.kernel.org/stable/c/98fee5bee97ad47b527a997d5786410430d1f0e9",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/98fee5bee97ad47b527a997d5786410430d1f0e9"
},
{
"name": "https://git.kernel.org/stable/c/6696f76c32ff67fec26823fc2df46498e70d9bf3",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/6696f76c32ff67fec26823fc2df46498e70d9bf3"
},
{
"name": "https://git.kernel.org/stable/c/67f16bf2cc1698fd50e01ee8a2becc5a8e6d3a3e",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/67f16bf2cc1698fd50e01ee8a2becc5a8e6d3a3e"
},
{
"name": "https://git.kernel.org/stable/c/77d210e8db4d61d43b2d16df66b1ec46fad2ee01",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/77d210e8db4d61d43b2d16df66b1ec46fad2ee01"
},
{
"name": "https://git.kernel.org/stable/c/9a9ab0d963621d9d12199df9817e66982582d5a5",
"refsource": "MISC",
"url": "https://git.kernel.org/stable/c/9a9ab0d963621d9d12199df9817e66982582d5a5"
}
]
}
},
"nvd.nist.gov": {
"cve": {
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix race between mmput() and do_exit()\n\nTask A calls binder_update_page_range() to allocate and insert pages on\na remote address space from Task B. For this, Task A pins the remote mm\nvia mmget_not_zero() first. This can race with Task B do_exit() and the\nfinal mmput() refcount decrement will come from Task A.\n\n Task A | Task B\n ------------------+------------------\n mmget_not_zero() |\n | do_exit()\n | exit_mm()\n | mmput()\n mmput() |\n exit_mmap() |\n remove_vma() |\n fput() |\n\nIn this case, the work of ____fput() from Task B is queued up in Task A\nas TWA_RESUME. So in theory, Task A returns to userspace and the cleanup\nwork gets executed. However, Task A instead sleep, waiting for a reply\nfrom Task B that never comes (it\u0027s dead).\n\nThis means the binder_deferred_release() is blocked until an unrelated\nbinder event forces Task A to go back to userspace. All the associated\ndeath notifications will also be delayed until then.\n\nIn order to fix this use mmput_async() that will schedule the work in\nthe corresponding mm-\u003easync_put_work WQ instead of Task A."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: binder: corrige la ejecuci\u00f3n entre mmput() y do_exit() La tarea A llama a binder_update_page_range() para asignar e insertar p\u00e1ginas en un espacio de direcciones remoto desde la tarea B. Para esto, la tarea A fija el mm remoto a trav\u00e9s de mmget_not_zero() primero. Esto puede competir con la Tarea B do_exit() y la disminuci\u00f3n final del recuento de mmput() provendr\u00e1 de la Tarea A. Tarea A | Tarea B ------------------+------------------ mmget_not_zero() | | hacer_salir() | salida_mm() | mmput() mmput() | salida_mmap() | eliminar_vma() | salida() | En este caso, el trabajo de ____fput() de la Tarea B se pone en cola en la Tarea A como TWA_RESUME. Entonces, en teor\u00eda, la Tarea A regresa al espacio de usuario y se ejecuta el trabajo de limpieza. Sin embargo, la Tarea A duerme, esperando una respuesta de la Tarea B que nunca llega (est\u00e1 muerta). Esto significa que binder_deferred_release() est\u00e1 bloqueado hasta que un evento de carpeta no relacionado obligue a la Tarea A a regresar al espacio de usuario. Todas las notificaciones de defunci\u00f3n asociadas tambi\u00e9n se retrasar\u00e1n hasta entonces. Para solucionar este problema, utilice mmput_async() que programar\u00e1 el trabajo en el mm-\u0026gt;async_put_work WQ correspondiente en lugar de la Tarea A."
}
],
"id": "CVE-2023-52609",
"lastModified": "2024-03-18T12:38:25.490",
"metrics": {},
"published": "2024-03-18T11:15:07.743",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/252a2a5569eb9f8d16428872cc24dea1ac0bb097"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/6696f76c32ff67fec26823fc2df46498e70d9bf3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/67f16bf2cc1698fd50e01ee8a2becc5a8e6d3a3e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/77d210e8db4d61d43b2d16df66b1ec46fad2ee01"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/7e7a0d86542b0ea903006d3f42f33c4f7ead6918"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/95b1d336b0642198b56836b89908d07b9a0c9608"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/98fee5bee97ad47b527a997d5786410430d1f0e9"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/9a9ab0d963621d9d12199df9817e66982582d5a5"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
}
}
}
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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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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.