Use-after-free vulnerability in iio: trigger: sysfs
Summary
GSD-2022-1004462: iio: trigger: sysfs: fix use-after-free on remove. Affects Kernel versions >= f38bc926d022ebd67baad6ac7fc22c95fbc6238c, < 4687c3f955240ca2a576bdc3f742d4d915b6272d. No fix is published. How to fix ↓
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Background
The iio: trigger: sysfs is a component in the Linux Kernel that provides a sysfs interface for configuring and managing triggers in the Industrial I/O (IIO) subsystem. The IIO subsystem is responsible for handling data from various sensors and devices. The sysfs interface allows users to interact with triggers and configure their behavior. However, a use-after-free vulnerability has been discovered in the sysfs component, which could lead to potential security issues.
Vulnerability Detail
The use-after-free vulnerability in iio: trigger: sysfs occurs when a trigger is removed from the system. The vulnerability is caused by improper handling of trigger removal, which can result in a use-after-free condition. An attacker could exploit this vulnerability by triggering the removal of a specific trigger, leading to a use-after-free situation. This could potentially allow the attacker to execute arbitrary code or cause a denial-of-service condition. The vulnerability was introduced in version v3.7 of the Linux Kernel and has been fixed in version v5.15.51.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the fix by updating the Linux Kernel to the patched version.
Conclusion
The use-after-free vulnerability in the iio: trigger: sysfs component of the Linux Kernel has the potential to be exploited by attackers to execute arbitrary code or cause a denial-of-service condition. It is crucial to update the Linux Kernel to version v5.15.51 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
iio: trigger: sysfs is a component in the Linux Kernel that provides a sysfs interface for configuring and managing triggers in the Industrial I/O (IIO) subsystem.
A use-after-free vulnerability occurs when a program or system continues to use a memory address after it has been freed. This can lead to various security issues, including code execution or denial-of-service.
An attacker can exploit this vulnerability by triggering the removal of a specific trigger in the iio: trigger: sysfs component, leading to a use-after-free condition. This could potentially allow the attacker to execute arbitrary code or cause a denial-of-service condition.
Yes, this vulnerability has been fixed in version v5.15.51 of the Linux Kernel.
Users can obtain the fixed version of the Linux Kernel from the official repository at https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/.
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