ALSA: gus: fix null pointer dereference on pointer block
Summary
GSD-2021-1002219: ALSA: gus: fix null pointer dereference on pointer block. Affects Kernel versions < 3e28e083dcdf03a18a083f8a47b6bb6b1604b5be. 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 systems. The gus driver is responsible for supporting Gravis UltraSound sound cards. This vulnerability affects the gus driver in the Linux Kernel.
Vulnerability Detail
The vulnerability in the gus driver of the ALSA subsystem allows for a null pointer dereference on the pointer block. This can lead to a system crash or potential privilege escalation if exploited by an attacker. The vulnerability was fixed in Linux Kernel version v4.4.293 by commit 3e28e083dcdf03a18a083f8a47b6bb6b1604b5be.
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.
Conclusion
The ALSA gus driver vulnerability can result in a null pointer dereference on the pointer block, potentially leading to a system crash or privilege escalation. It is crucial to update the Linux Kernel to version v4.4.293 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
ALSA (Advanced Linux Sound Architecture) is a software framework and part of the Linux kernel that provides an API for sound card device drivers.
The gus driver is responsible for supporting Gravis UltraSound sound cards in the ALSA subsystem.
A null pointer dereference occurs when a program attempts to access or manipulate data using a null pointer, resulting in a crash or potential security vulnerability.
The vulnerability can lead to a system crash or potential privilege escalation if exploited by an attacker.
To update the Linux Kernel, you can apply the relevant patch or upgrade the kernel package on the affected system. Follow the official documentation and guidelines provided by your Linux distribution or vendor for proper kernel update procedures.
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