ALSA: pcm: Test for "silence" field in struct "pcm_format_data"
Summary
GSD-2022-1002459: ALSA: pcm: Test for "silence" field in struct "pcm_format_data". Affects Kernel versions < 77af45df08768401602472f3e3879dce14f55497. No fix is published. How to fix ↓
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Background
The ALSA (Advanced Linux Sound Architecture) package is responsible for providing audio and MIDI functionality to the Linux operating system. It includes drivers, libraries, and utilities for audio playback and recording. The vulnerability in question affects the pcm (Pulse Code Modulation) component of ALSA, which is responsible for handling audio data streams.
Vulnerability Detail
The vulnerability arises from a missing test for the "silence" field in the "pcm_format_data" structure. This oversight could potentially lead to security vulnerabilities, although the actual impact and attack plausibility have not been proven. The vulnerability has been fixed in the Linux Kernel version v4.9.311 by commit 77af45df08768401602472f3e3879dce14f55497.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No workaround has been provided for this vulnerability.
Conclusion
The ALSA pcm component is vulnerable to a missing test for the "silence" field in the "pcm_format_data" structure. It is recommended to update the Linux Kernel to version v4.9.311 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
ALSA stands for Advanced Linux Sound Architecture. It is a software framework and part of the Linux kernel that provides audio and MIDI functionality.
pcm stands for Pulse Code Modulation and is a component of ALSA responsible for handling audio data streams.
The "silence" field in the pcm_format_data structure represents the value used to indicate silence in an audio data stream.
The potential ramifications of this vulnerability are not yet proven, but it could potentially lead to security vulnerabilities in the ALSA pcm component.
To fix this vulnerability, update the Linux Kernel to version v4.9.311 or later by applying the commit 77af45df08768401602472f3e3879dce14f55497 to the kernel source code and recompiling it.
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