ALSA: seq: Fix race of snd_seq_timer_open() in Kernel
Summary
GSD-2021-1000945: ALSA: seq: Fix race of snd_seq_timer_open(). Affects Kernel versions < bd7d88b0874f82f7b29d1a53e574cedaf23166ba. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential functionalities such as process management, memory management, and device drivers. The ALSA (Advanced Linux Sound Architecture) subsystem within the Kernel handles audio and MIDI functionality. One of its components, snd_seq_timer_open(), is responsible for opening a timer for sequencer events. However, a race condition vulnerability has been discovered in this function.
Vulnerability Detail
The race condition vulnerability in snd_seq_timer_open() can lead to potential security issues. A race condition occurs when multiple threads or processes access shared resources concurrently, leading to unexpected behavior or data corruption. In this case, the vulnerability can be exploited by an attacker to manipulate the timer and potentially disrupt the normal operation of the ALSA subsystem. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No workaround has been provided for this vulnerability. It is essential to update the Kernel to the fixed version as mentioned above.
Conclusion
The race condition vulnerability in snd_seq_timer_open() within the Kernel can potentially be exploited to manipulate the timer and disrupt the ALSA subsystem. It is crucial to update the Kernel to version v5.10.44 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a core component of the Linux operating system that manages system resources and facilitates communication between hardware and software.
ALSA (Advanced Linux Sound Architecture) is a subsystem within the Linux Kernel that handles audio and MIDI functionality.
snd_seq_timer_open() is a function in the ALSA subsystem that is responsible for opening a timer for sequencer events.
A race condition occurs when multiple threads or processes access shared resources concurrently, leading to unexpected behavior or data corruption.
To fix this vulnerability, update the Linux Kernel to version v5.10.44 or later, which includes the necessary fix for snd_seq_timer_open().
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