CVE-2021-47361
mcb: fix error handling in mcb_alloc_bus()
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
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 código llama a put_device(carrier) pero aún no hemos llamado a get_device( transportista) y probablemente eso conduzca a un uso posterior gratuito. 2) Después de device_initialize() entonces necesitamos usar put_device() para liberar el bus. Esto liberará los recursos internos vinculados al dispositivo y llamará a mcb_free_bus() que liberará el resto.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-21 CVE Reserved
- 2024-05-21 CVE Published
- 2024-05-22 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/5d9e2ab9fea4cdf0a2522f5cbed2e7fbb220d757 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.7 < 4.9.285 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 4.9.285" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.7 < 4.14.249 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 4.14.249" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.7 < 4.19.209 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 4.19.209" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.7 < 5.4.150 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.4.150" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.7 < 5.10.70 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.10.70" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.7 < 5.14.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.14.9" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.7 < 5.15 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.7 < 5.15" | en |
Affected
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