Vulnerability in Linux Kernel: PM: core: keep irq flags in device_pm_check_callbacks()
Summary
GSD-2022-1002220: PM: core: keep irq flags in device_pm_check_callbacks(). Affects Kernel versions < 0cccf9d4fb45f1acbc0bbf6d7e4d8d0fb7a10416. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system that serves as the foundation for many Linux distributions. It provides essential functionality for managing hardware resources, including power management. The Power Management (PM) subsystem in the Linux Kernel is responsible for controlling the power state of devices and managing their transitions between different power-saving modes. One of the core components of the PM subsystem is the device_pm_check_callbacks() function, which is used to check and handle power management callbacks for devices. This function is critical for ensuring proper power management and efficient resource utilization in the Linux Kernel.
Vulnerability Detail
The vulnerability identified as GSD-2022-1002220 in the Linux Kernel's PM subsystem arises from a flaw in the device_pm_check_callbacks() function. The function fails to preserve the interrupt (irq) flags during its execution, potentially leading to unexpected behavior and security vulnerabilities. Attackers may exploit this vulnerability to manipulate the power management callbacks of devices, resulting in system instability, denial of service, or even privilege escalation. The impact and attack plausibility of this vulnerability have not been proven yet, but it is crucial to address it to ensure the overall security and stability of systems running the affected Linux Kernel versions.
How To Fix
No fixed version is published for this vulnerability.
The vulnerability has been fixed in the Linux Kernel version v5.4.189 by commit 0cccf9d4fb45f1acbc0bbf6d7e4d8d0fb7a10416. To rectify the vulnerability, users are advised to update their Linux Kernel installations to the latest version available. This can be done by obtaining the updated kernel source code from the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and compiling it according to the provided instructions. Additionally, users can also rely on package managers or distribution-specific update mechanisms to install the patched version of the Linux Kernel.
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Workaround
No specific workaround has been mentioned for this vulnerability.
Conclusion
The vulnerability in the Linux Kernel's PM subsystem, identified as GSD-2022-1002220, poses potential risks to system stability and security. It is crucial to update the Linux Kernel to the fixed version (v5.4.189) to mitigate these risks. Promptly applying security patches and following best security practices are essential for maintaining a secure and stable system. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can vary depending on the specific system configuration and the presence of potential attackers. However, it could potentially lead to system instability, denial of service, or privilege escalation.
There is no evidence to suggest that this vulnerability has been exploited in the wild. However, it is always recommended to apply security patches promptly to mitigate potential risks.
The vulnerability affects versions of the Linux Kernel prior to v5.4.189.
The primary mitigation for this vulnerability is to update the Linux Kernel to the fixed version. Additionally, maintaining good security practices, such as restricting access to privileged accounts and implementing network security measures, can help reduce the risk of exploitation.
You can find more information about this vulnerability, including the fix commit and the affected package, in the vulnerability database entry: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1002xxx/GSD-2022-1002220.json
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