Vulnerability in Kernel: ASoC max9759 - Underflow in speaker_gain_control_put()
Summary
GSD-2022-1000589: ASoC: max9759: fix underflow in speaker_gain_control_put(). Affects Kernel versions >= fa8d915172b8c10ec0734c4021e99e9705023b07, < baead410e5db49e962a67fffc17ac30e44b50b7c. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the overall stability and security of the system. The ASoC (Audio System on Chip) subsystem within the Kernel is responsible for handling audio-related functionalities, including audio codecs, digital signal processing, and audio routing. One of the audio codecs supported by ASoC is max9759, which is used in various devices for audio playback. The vulnerability in question affects the speaker_gain_control_put() function within the max9759 driver.
Vulnerability Detail
The vulnerability arises due to an underflow issue in the speaker_gain_control_put() function of the max9759 driver. An underflow occurs when a calculation results in a value smaller than the minimum representable value for the data type used. In this case, the underflow can lead to a potential security vulnerability. Although the exact impact and attack vectors have not been proven, it is crucial to address this vulnerability to prevent any potential exploitation. The vulnerability was introduced in version v4.17 of the Linux Kernel and has been fixed in version v5.15.22.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As this vulnerability has been fixed in the latest version of the Linux Kernel, there is no specific workaround available. It is strongly advised to update the Kernel to the latest version to eliminate the vulnerability.
Conclusion
The vulnerability in the Kernel's ASoC max9759 driver, specifically in the speaker_gain_control_put() function, has the potential to be exploited and should be addressed promptly. Updating the Linux Kernel to version v5.15.22 or later is the recommended solution to fix the vulnerability. It is crucial to stay vigilant and apply necessary updates to ensure the security and stability of the system. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The exact impact of this vulnerability is not yet proven. However, it has the potential to be exploited by malicious actors to gain unauthorized access or perform other malicious activities on affected systems.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will provide real-time monitoring and alerts for open-source vulnerabilities, including this one.
There are no known instances of this vulnerability being exploited at the moment. However, it is essential to apply the necessary updates to mitigate the risk and prevent potential exploitation.
It is not recommended to manually patch the vulnerability without updating the entire Kernel. Updating the Kernel to the latest version ensures that all relevant fixes and security patches are applied, providing a comprehensive solution to the vulnerability.
You can find more information about this vulnerability, including technical details and the fix, in the official Linux Kernel repository. The commit baead410e5db49e962a67fffc17ac30e44b50b7c addresses this vulnerability.
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