CVE-2021-47500
iio: mma8452: Fix trigger reference couting
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
iio: mma8452: Fix trigger reference couting
The mma8452 driver directly assigns a trigger to the struct iio_dev. The
IIO core when done using this trigger will call `iio_trigger_put()` to drop
the reference count by 1.
Without the matching `iio_trigger_get()` in the driver the reference count
can reach 0 too early, the trigger gets freed while still in use and a
use-after-free occurs.
Fix this by getting a reference to the trigger before assigning it to the
IIO device.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iio: mma8452: corrección del cálculo de referencia del disparador El controlador mma8452 asigna directamente un disparador a la estructura iio_dev. El núcleo de IIO, cuando termine de usar este activador, llamará a `iio_trigger_put()` para reducir el recuento de referencias en 1. Sin el `iio_trigger_get()` coincidente en el controlador, el recuento de referencias puede llegar a 0 demasiado pronto, el activador se libera mientras aún está en se produce un uso y un use-after-free. Solucione este problema obteniendo una referencia al disparador antes de asignarlo al dispositivo IIO.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-22 CVE Reserved
- 2024-05-24 CVE Published
- 2024-05-25 EPSS Updated
- 2024-09-11 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/ae6d9ce05691bf79694074db7c7da980080548af | Vuln. Introduced |
| URL | Date | SRC |
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| 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" | >= 4.2 < 4.4.295 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 4.4.295" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.2 < 4.9.293 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 4.9.293" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.2 < 4.14.258 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 4.14.258" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.2 < 4.19.221 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 4.19.221" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.2 < 5.4.165 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 5.4.165" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.2 < 5.10.85 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 5.10.85" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.2 < 5.15.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 5.15.8" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.2 < 5.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.2 < 5.16" | en |
Affected
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