ALSA: timer: Use deferred fasync helper
Summary
GSD-2022-1005948: ALSA: timer: Use deferred fasync helper. Affects Kernel versions < dd9d894b4163bd768675e66a9ce3251e3e3bc7f6. 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 drivers. It allows applications to communicate with sound devices and perform various audio operations. The ALSA timer component is responsible for providing timing services to applications, allowing them to schedule audio events accurately.
The vulnerability in ALSA timer arises from the lack of proper use of the deferred fasync helper. This vulnerability affects the Linux Kernel package.
Vulnerability Detail
The vulnerability in ALSA timer arises from the improper use of the fasync helper, which is responsible for handling asynchronous notifications. By not using the deferred fasync helper, a race condition can occur when multiple processes attempt to access the timer concurrently. This race condition can lead to various issues, including potential privilege escalation or denial of service.
The vulnerability has been assigned the ID GSD-2022-1005948 and is fixed in Linux Kernel version v5.4.211 by commit dd9d894b4163bd768675e66a9ce3251e3e3bc7f6.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The vulnerability in ALSA timer, caused by the improper use of the fasync helper, can lead to a race condition and potential security risks. To mitigate these risks, it is crucial to update the Linux Kernel package to version v5.4.211 or later. This update includes the necessary fix commit dd9d894b4163bd768675e66a9ce3251e3e3bc7f6. 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 drivers.
ALSA timer is a component of ALSA that provides timing services to applications, allowing them to schedule audio events accurately.
The vulnerability in ALSA timer can lead to a race condition when multiple processes access the timer concurrently. This race condition can result in potential privilege escalation or denial of service.
To fix this vulnerability, update the Linux Kernel package to version v5.4.211 or later, which includes the necessary fix commit dd9d894b4163bd768675e66a9ce3251e3e3bc7f6.
No specific workaround has been provided for this vulnerability. It is recommended to update the Linux Kernel package to the fixed version.
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