Linux Kernel Intel Trace Hub Device Leak Vulnerability

A vulnerability in the Linux kernel's handling of Intel Trace Hub devices has been addressed. The issue involved a memory leak caused by not properly releasing a reference to the device when opening the output device, particularly on successful open operations. While a previous commit had fixed the leak in some error paths, it did not address all of them, leaving a reference leak on successful openings. This vulnerability affects the Linux kernel stable tree.

Impact

The vulnerability could lead to a memory leak, causing increased memory usage over time, which could potentially be exploited to cause a denial-of-service condition.

Reproduction

The vulnerability can be reproduced by opening an output device for an Intel Trace Hub device in the Linux kernel. The reference to the device is not properly released, leading to a memory leak. This can be observed by monitoring the memory usage of the system, which will increase over time without being properly freed.

Remediation

Users can upgrade to the latest version of the Linux kernel stable tree, where this vulnerability has been fixed.