Vulnerability in Kernel: PM: core: keep irq flags in device_pm_check_callbacks()
Summary
GSD-2022-1001477: PM: core: keep irq flags in device_pm_check_callbacks(). Affects Kernel versions < 2add538e57a2825c61d639260386f385c75e4166. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages the system's resources and facilitates communication between hardware and software. It provides essential functionalities such as memory management, process scheduling, and device drivers. The vulnerability in the Kernel's PM (Power Management) core specifically affects the 'device_pm_check_callbacks()' function. This function is responsible for checking the power management callbacks of devices and ensuring their proper execution. The vulnerability allows an attacker to manipulate the IRQ (Interrupt Request) flags during the execution of power management callbacks, potentially leading to unauthorized access or system instability.
Vulnerability Detail
The vulnerability arises from a lack of proper handling of IRQ flags in the 'device_pm_check_callbacks()' function of the Kernel's PM core. By manipulating these flags, an attacker can disrupt the normal execution of power management callbacks, potentially causing system instability or gaining unauthorized access. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in Linux Kernel version v5.16.19 by commit 2add538e57a2825c61d639260386f385c75e4166.
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 to the fixed version to ensure the security and stability of the system.
Conclusion
The vulnerability in the Kernel's PM core, specifically in the 'device_pm_check_callbacks()' function, can potentially lead to unauthorized access or system instability. It is crucial to update the Linux Kernel to version v5.16.19 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that manages the system's resources and facilitates communication between hardware and software.
The PM (Power Management) core in the Kernel is responsible for managing the power-related functionalities of devices and ensuring efficient power usage.
'device_pm_check_callbacks()' is a function in the Kernel's PM core that checks the power management callbacks of devices and ensures their proper execution.
IRQ (Interrupt Request) flags are used to manage and prioritize hardware interrupts in a system. They play a crucial role in handling hardware events and ensuring proper execution of interrupt service routines.
To update the Linux Kernel, you can download the updated source code from the official Git repository and follow the installation instructions. Alternatively, you can wait for your Linux distribution to release an updated package containing the fixed Kernel version.
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