Tracker / CVE-2021-47500
CVE-2021-47500
High 7.8
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.
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 4.10 → 4.14.258 |
| linux | linux_kernel · 4.15 → 4.19.221 |
| linux | linux_kernel · 4.2 → 4.4.295 |
| linux | linux_kernel · 4.20 → 5.4.165 |
| linux | linux_kernel · 4.5 → 4.9.293 |
| linux | linux_kernel · 5.11 → 5.15.8 |
| linux | linux_kernel · 5.5 → 5.10.85 |
Analysis
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