Fix the wrong asm constraint in delay_loop() in Kernel
Summary
GSD-2022-1004090: x86/delay: Fix the wrong asm constraint in delay_loop(). Affects Kernel versions >= e01b70ef3eb3080fecc35e15f68cd274c0a48163, < 55bd0545d2792cb512559ba493c29b45f49e20f4. 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 provides an interface for user applications. It is responsible for handling hardware devices, memory management, and process scheduling. The delay_loop() function in the x86 architecture is used to introduce a delay in the execution of code. However, a vulnerability has been identified in the implementation of delay_loop() that can lead to incorrect behavior and potential security issues.
Vulnerability Detail
The vulnerability arises from a wrong asm constraint in the delay_loop() function in the x86 architecture. This incorrect constraint can result in unexpected behavior and potentially allow attackers to exploit the system. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability was introduced in version v2.6.27 of the Linux Kernel and is fixed in version v4.9.318.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v4.9.318 or later. This can be done by downloading the latest stable version of the Kernel from the official Git repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and following the installation instructions provided by the Kernel developers.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The vulnerability in the Kernel's delay_loop() function can lead to incorrect behavior and potential security issues. It is recommended to update the Linux Kernel to version v4.9.318 or later to fix this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven. However, it has the potential to lead to incorrect behavior and may be exploitable by attackers.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and the playground will provide real-time alerts for open-source vulnerabilities.
Yes, a patch is available in version v4.9.318 of the Linux Kernel. It is recommended to update to this version or a later one to fix the vulnerability.
Yes, the vulnerability was introduced in version v2.6.27 of the Linux Kernel. It is advisable to update to version v4.9.318 or later to mitigate the vulnerability.
No known exploit for this vulnerability has been reported at this time.
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