ALSA: hda: Fix UAF of leds class devs at unbinding

Kernel Updated 02 Oct 2025

Summary

27/02/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000654: ALSA: hda: Fix UAF of leds class devs at unbinding. Affects Kernel versions < 813e9f3e06d22e29872d4fd51b54992d89cf66c8. No fix is published. How to fix ↓

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Background

The ALSA (Advanced Linux Sound Architecture) is a software framework and part of the Linux kernel that provides an API for sound card device drivers. It enables audio functionality on Linux-based systems. The hda (High Definition Audio) component within ALSA is responsible for supporting audio devices that comply with the Intel High Definition Audio specification. This vulnerability affects the hda component in the Linux Kernel.

Vulnerability Detail

The vulnerability identified as GSD-2022-1000654 in the Linux Kernel's hda component involves a use-after-free (UAF) issue related to the handling of leds class devices during unbinding. A use-after-free vulnerability occurs when a program continues to use a memory area after it has been freed, which can lead to various security issues. In this case, the UAF occurs when the leds class devices are not properly handled during the unbinding process, potentially allowing an attacker to exploit this vulnerability to execute arbitrary code or cause a denial-of-service (DoS) condition.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no specific workaround mentioned for this vulnerability. Users are advised to update their Linux Kernel to the fixed version as mentioned in the 'how_to_fix' section.

Conclusion

The ALSA hda component in the Linux Kernel is vulnerable to a use-after-free issue related to the handling of leds class devices during unbinding. This vulnerability can potentially be exploited by attackers to execute arbitrary code or cause a DoS condition. It is recommended to update the Linux Kernel to version v5.16.8 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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