Linux kernel ASoC AIU enum value validation flaw

Executive Summary

This vulnerability in the Linux kernel involves the ASoC meson AIU component. The issue occurs in the HDMI and internal codec mux put callbacks, where an enum value is converted using snd_soc_enum_item_to_val() before validating if the value is valid for the enumeration. This could allow invalid enum values to be processed.

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Detection Guidance

This vulnerability is specific to the Linux kernel's ASoC subsystem, particularly in the AIU HDMI and internal codec mux components. Detection requires checking the kernel version and examining the affected code paths. Use commands like 'uname -a' to check the kernel version and 'dmesg | grep aiu' to look for related errors or warnings.

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Impact Analysis

This vulnerability may allow an attacker to cause undefined behavior or crashes in the Linux kernel by providing invalid enum values to the affected audio components. This could lead to system instability or potential denial-of-service conditions.

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Compliance Impact

This vulnerability does not directly affect compliance with standards like GDPR or HIPAA as it is a low-level kernel issue related to enum validation in audio drivers. No evidence suggests it impacts data protection or privacy requirements.

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Mitigation Strategies

Update the Linux kernel to a version that includes the fix for this vulnerability. Monitor kernel updates from your distribution and apply them promptly. If updating is not immediately possible, consider disabling the affected AIU HDMI and internal codec mux components if they are not critical.

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