ALSA: gus: fix null pointer dereference on pointer block

Kernel Updated 02 Oct 2025

Summary

29/11/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1002249: ALSA: gus: fix null pointer dereference on pointer block. Affects Kernel versions < ab4c1ebc40f699f48346f634d7b72b9c5193f315. 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 and MIDI functionality on Linux-based systems. The gus module within ALSA is responsible for supporting the Gravis UltraSound sound card.

The vulnerability in the gus module involves a null pointer dereference on the pointer block. This means that under certain conditions, the code attempts to access memory using a null pointer, leading to a crash or potential exploitation by an attacker. The impact and attack plausibility of this vulnerability have not been proven yet.

Vulnerability Detail

The vulnerability in the gus module of ALSA is caused by a null pointer dereference on the pointer block. When certain conditions are met, the code attempts to access memory using a null pointer, resulting in a crash or potential security exploit. The exact origin and trigger conditions of this vulnerability are not specified in the provided information. However, it is important to note that this vulnerability has been fixed in the Linux Kernel version v4.19.218 by commit ab4c1ebc40f699f48346f634d7b72b9c5193f315.

How To Fix

No fixed version is published for this vulnerability.

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Conclusion

The ALSA gus module vulnerability involving a null pointer dereference on the pointer block has been identified. It is recommended to update the Linux Kernel to version v4.19.218 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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