Increase stack size under KASAN in Linux Kernel
Summary
GSD-2022-1002133: riscv: Increase stack size under KASAN. Affects Kernel versions >= 8ad8b72721d0f07fa02dbe71f901743f9c71c8e6, < 34bc1f69bf569309e76e5dfd574ee9034ceca147. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for managing hardware resources, scheduling tasks, and facilitating communication between software and hardware components. The Kernel is responsible for ensuring the security and stability of the entire system. However, it is susceptible to vulnerabilities that can compromise its integrity and expose the system to potential attacks.
Vulnerability Detail
The identified vulnerability in the Linux Kernel involves the stack size under KASAN (Kernel Address Sanitizer). KASAN is a dynamic memory error detector that helps identify and mitigate memory-related bugs in the Kernel. The vulnerability arises from an insufficient stack size allocation, which can lead to stack overflow and subsequent memory corruption. An attacker could potentially exploit this vulnerability to execute arbitrary code, escalate privileges, or cause a denial-of-service (DoS) condition.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can manually modify the stack size under KASAN in the Kernel configuration. This can be achieved by adjusting the 'CONFIG_KASAN_STACK' parameter in the Kernel configuration file. However, it is strongly advised to apply the official fix by updating to the recommended Kernel version rather than relying on manual modifications.
Conclusion
The identified vulnerability in the Linux Kernel, which involves an insufficient stack size under KASAN, can be mitigated by updating the Kernel to version v5.10.110 or later. This update ensures that the stack size is appropriately increased, reducing the risk of stack overflow and memory corruption. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The Linux Kernel is an open-source operating system kernel that provides essential functionality for managing hardware resources, scheduling tasks, and facilitating communication between software and hardware components.
KASAN (Kernel Address Sanitizer) is a dynamic memory error detector in the Linux Kernel that helps identify and mitigate memory-related bugs.
This vulnerability can potentially allow an attacker to execute arbitrary code, escalate privileges, or cause a denial-of-service (DoS) condition by exploiting stack overflow and memory corruption.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.10.110 or later, which includes the necessary fix for the stack size under KASAN.
Yes, a workaround involves manually modifying the stack size under KASAN in the Kernel configuration. However, it is strongly advised to apply the official fix by updating to the recommended Kernel version.
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