fkie_cve-2021-47653
Vulnerability from fkie_nvd
Published
2025-02-26 06:37
Modified
2025-03-24 17:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
media: davinci: vpif: fix use-after-free on driver unbind
The driver allocates and registers two platform device structures during
probe, but the devices were never deregistered on driver unbind.
This results in a use-after-free on driver unbind as the device
structures were allocated using devres and would be freed by driver
core when remove() returns.
Fix this by adding the missing deregistration calls to the remove()
callback and failing probe on registration errors.
Note that the platform device structures must be freed using a proper
release callback to avoid leaking associated resources like device
names.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: davinci: vpif: fix use-after-free on driver unbind\n\nThe driver allocates and registers two platform device structures during\nprobe, but the devices were never deregistered on driver unbind.\n\nThis results in a use-after-free on driver unbind as the device\nstructures were allocated using devres and would be freed by driver\ncore when remove() returns.\n\nFix this by adding the missing deregistration calls to the remove()\ncallback and failing probe on registration errors.\n\nNote that the platform device structures must be freed using a proper\nrelease callback to avoid leaking associated resources like device\nnames."
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"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: media: davinci: vpif: fix use-after-free on driver unbind El controlador asigna y registra dos estructuras de dispositivos de plataforma durante la sonda, pero los dispositivos nunca se anularon el registro en la anulaci\u00f3n del enlace del controlador. Esto da como resultado un use-after-free en la anulaci\u00f3n del enlace del controlador, ya que las estructuras de dispositivos se asignaron utilizando devres y ser\u00edan liberadas por el n\u00facleo del controlador cuando remove() regrese. Solucione esto agregando las llamadas de anulaci\u00f3n de registro faltantes a la devoluci\u00f3n de llamada remove() y haciendo que la sonda falle en los errores de registro. Tenga en cuenta que las estructuras de dispositivos de plataforma se deben liberar utilizando una devoluci\u00f3n de llamada de liberaci\u00f3n adecuada para evitar filtrar recursos asociados, como nombres de dispositivos."
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"id": "CVE-2021-47653",
"lastModified": "2025-03-24T17:46:18.150",
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"scope": "UNCHANGED",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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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.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- 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.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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