Fix page corruption caused by racy check in __free_pages in Kernel
Summary
GSD-2023-1002359: Fix page corruption caused by racy check in __free_pages. Affects Kernel versions >= e320d3012d25b1fb5f3df4edb7bd44a1c362ec10, < 3af734f3eac6f70ef8e272a80da40544b9d0f2b5. 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 vulnerability in question affects the Kernel's handling of page freeing, which can lead to page corruption.
Vulnerability Detail
The vulnerability arises from a race condition in the __free_pages function of the Kernel. This race condition can result in page corruption, potentially leading to various issues such as data loss, system instability, or even privilege escalation. The vulnerability was introduced in version v5.10 of the Kernel and has been fixed in version v5.15.94.
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 Kernel, there is no specific workaround available. However, it is crucial to ensure that the Kernel is regularly updated to the latest stable release to mitigate potential security risks.
Conclusion
The vulnerability in the Kernel's __free_pages function can lead to page corruption and potential security risks. It is crucial to update the Kernel to version v5.15.94 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to page corruption, which may result in data loss, system instability, or privilege escalation.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there is no known exploit for this vulnerability. However, it is essential to apply the fix promptly to minimize the risk of exploitation.
The vulnerability itself does not provide remote exploitation capabilities. However, if an attacker gains access to the affected system, they may be able to leverage this vulnerability for privilege escalation or other malicious activities.
If updating the Kernel is not immediately feasible, it is recommended to implement other security measures such as network segmentation, access controls, and regular system monitoring to minimize the risk of exploitation.
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