Vulnerability in Kernel: PM: core: keep irq flags in device_pm_check_callbacks()
Summary
GSD-2022-1002339: PM: core: keep irq flags in device_pm_check_callbacks(). Affects Kernel versions < be8bc05f38d667eda1e820bc6f69234795be7809. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential functionalities for device drivers, process management, memory management, and more. The vulnerability in question affects the Power Management (PM) core module of the Kernel. The PM core is responsible for managing power-related operations and optimizing power consumption in devices. This vulnerability specifically pertains to the 'device_pm_check_callbacks()' function within the PM core.
Vulnerability Detail
The vulnerability arises from a flaw in the 'device_pm_check_callbacks()' function of the Kernel's PM core. It fails to preserve the interrupt (irq) flags during the execution of the function, potentially leading to unexpected behavior and security vulnerabilities. Attackers may exploit this vulnerability to manipulate interrupt handling, disrupt device operations, or gain unauthorized access to system resources. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been addressed in the Linux Kernel version v4.19.238 through the commit be8bc05f38d667eda1e820bc6f69234795be7809.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can temporarily mitigate the risk by disabling or limiting the usage of the affected functionality. However, it is strongly advised to apply the official fix by updating the Kernel as soon as possible.
Conclusion
In conclusion, the vulnerability in the Kernel's PM core, specifically in the 'device_pm_check_callbacks()' function, could potentially lead to security vulnerabilities and unauthorized access to system resources. It is crucial to update the Linux Kernel to version v4.19.238 or later to mitigate this vulnerability. Users can also utilize Vulert (https://vulert.com) to check if their application is affected by this vulnerability using the Vulert Playground (https://vulert.com/scanner) without requiring access to the code or installation. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software.
The Power Management (PM) core is a module within the Kernel that handles power-related operations and optimizes power consumption in devices.
The impact of this vulnerability is not yet proven, but it could potentially lead to unexpected behavior, security vulnerabilities, and unauthorized access to system resources.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.19.238 or later. Alternatively, users can wait for their Linux distribution to provide an updated Kernel package and apply the necessary updates through the package manager.
Yes, users can temporarily mitigate the risk by disabling or limiting the usage of the affected functionality. However, it is strongly advised to apply the official fix by updating the Kernel as soon as possible.
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