Debian: CVE-2021-47500: linux -- security update

Debian: CVE-2021-47500: linux -- security update

Severity

7

CVSS

(AV:L/AC:L/Au:S/C:C/I:C/A:C)

Published

05/24/2024

Created

07/31/2024

Added

07/30/2024

Modified

01/28/2025

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.

Solution(s)

• debian-upgrade-linux

References

• https://attackerkb.com/topics/cve-2021-47500
• CVE - 2021-47500