fkie_cve-2021-47361
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2024-12-26 19:45
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
mcb: fix error handling in mcb_alloc_bus()
There are two bugs:
1) If ida_simple_get() fails then this code calls put_device(carrier)
but we haven't yet called get_device(carrier) and probably that
leads to a use after free.
2) After device_initialize() then we need to use put_device() to
release the bus. This will free the internal resources tied to the
device and call mcb_free_bus() which will free the rest.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | 5.15 | |
| linux | linux_kernel | 5.15 |
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mcb: corrige el manejo de errores en mcb_alloc_bus() Hay dos errores: 1) Si ida_simple_get() falla, entonces este c\u00f3digo llama a put_device(carrier) pero a\u00fan no hemos llamado a get_device( transportista) y probablemente eso conduzca a un uso posterior gratuito. 2) Despu\u00e9s de device_initialize() entonces necesitamos usar put_device() para liberar el bus. Esto liberar\u00e1 los recursos internos vinculados al dispositivo y llamar\u00e1 a mcb_free_bus() que liberar\u00e1 el resto."
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"id": "CVE-2021-47361",
"lastModified": "2024-12-26T19:45:51.123",
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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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