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Vulnerabilities CVE-2021-47500

CVE-2021-47500

High
Open
TLP:CLEAR

iio: mma8452: Fix trigger reference couting

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Description

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.

Details

CVSS Score
7.8
EPSS Score
0.24%

15.5th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Confidence
90%
Published
May 24, 2024
Last Modified
Aug 5, 2026
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