Refcount Leak in versatile_reboot_probe in Kernel
Summary
GSD-2022-1004142: power/reset: arm-versatile: Fix refcount leak in versatile_reboot_probe. Affects Kernel versions >= 0e545f57b708630c54c8c5c24ea7f7034f6c40d9, < 49fa778ee044b00471dd9ccae5f6a121fffea1ac. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that manages system resources and facilitates communication between hardware and software. It provides essential functionalities such as process management, memory management, and device drivers. The versatile_reboot_probe function in the Kernel is responsible for handling reboot requests on ARM Versatile platforms. However, a refcount leak vulnerability has been identified in this function, which can lead to resource exhaustion and potential system instability.
Vulnerability Detail
The refcount leak vulnerability in versatile_reboot_probe arises from a failure to properly release resources when handling reboot requests on ARM Versatile platforms. This can result in a gradual depletion of system resources, leading to performance degradation and potential system crashes. An attacker with local access to the affected system could potentially exploit this vulnerability to exhaust resources and disrupt system operations. The vulnerability was introduced in version v3.18 of the Linux Kernel and has been fixed in version v5.18.15.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the Kernel is not immediately feasible, a temporary workaround can be implemented by disabling the reboot functionality on ARM Versatile platforms. This can be achieved by modifying the system configuration to prevent the versatile_reboot_probe function from being invoked. However, this workaround should be considered temporary, and updating the Kernel to the latest version is still recommended for long-term security.
Conclusion
The refcount leak vulnerability in versatile_reboot_probe can have significant consequences for system stability and performance. It is crucial to promptly update the Linux Kernel to version v5.18.15 or later to mitigate this vulnerability. For further assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to resource exhaustion and potential system instability, resulting in performance degradation and system crashes.
An attacker with local access to the affected system could exploit this vulnerability to exhaust resources and disrupt system operations.
The vulnerability was introduced in version v3.18 of the Linux Kernel.
Yes, the vulnerability has been fixed in version v5.18.15 of the Linux Kernel.
It is recommended to update the Linux Kernel to version v5.18.15 or later. Regularly updating the Kernel is also advisable to ensure the latest security patches are applied.
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