PT-2024-8923 · Linux+4 · Linux Kernel+4
Lars-Peter Clausen
·
Published
2024-05-22
·
Updated
2025-06-18
·
CVE-2021-47500
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions:
Linux kernel (affected versions not specified)
Description:
The issue is related to a use-after-free error in the Linux kernel's mma8452 driver. The driver directly assigns a trigger to the struct iio dev, and the IIO core calls
iio trigger put() to drop the reference count by 1 when done using this trigger. Without the matching iio trigger get() in the driver, the reference count can reach 0 too early, causing the trigger to be freed while still in use and resulting in a use-after-free error. This can potentially allow an attacker to elevate privileges in the system.Recommendations:
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Red Os
Suse
Ubuntu