Vulnerability in Kernel: x86/Kconfig with CONFIG_X86_X32_ABI=y and llvm-objcopy
Summary
GSD-2022-1001990: x86/Kconfig: Do not allow CONFIG_X86_X32_ABI=y with llvm-objcopy. Affects Kernel versions < 9cb90f9ad5975ddfc90d0906b40e9c71c2eca44e. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities, such as managing system resources, handling device drivers, and facilitating communication between different software components. The x86/Kconfig module is responsible for configuring various options related to the x86 architecture. One of these options is CONFIG_X86_X32_ABI, which enables support for the x32 ABI (Application Binary Interface). llvm-objcopy is a utility used for copying and manipulating object files. This vulnerability arises when CONFIG_X86_X32_ABI is set to 'y' while using llvm-objcopy.
Vulnerability Detail
The vulnerability occurs due to an incompatible configuration between CONFIG_X86_X32_ABI and llvm-objcopy. When CONFIG_X86_X32_ABI is enabled, it assumes that the system is using the x32 ABI, which is a hybrid of 32-bit and 64-bit modes. However, llvm-objcopy does not support the x32 ABI, leading to potential issues and vulnerabilities. The impact of this vulnerability is not yet proven, but it has been identified as a potential security risk. The vulnerability has been fixed in Linux Kernel version v5.10.111 by commit 9cb90f9ad5975ddfc90d0906b40e9c71c2eca44e.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. The recommended approach is to update the Linux Kernel to the fixed version.
Conclusion
The vulnerability in the Kernel, specifically in the x86/Kconfig module with CONFIG_X86_X32_ABI=y and llvm-objcopy, can lead to potential security risks. It is crucial to update the Linux Kernel to version v5.10.111 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The Kernel is a critical component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities, such as managing system resources, handling device drivers, and facilitating communication between different software components.
CONFIG_X86_X32_ABI is a configuration option in the x86/Kconfig module of the Linux Kernel. It enables support for the x32 ABI, which is a hybrid of 32-bit and 64-bit modes.
llvm-objcopy is a utility used for copying and manipulating object files. It is not compatible with the x32 ABI, which leads to the vulnerability when CONFIG_X86_X32_ABI is enabled.
The potential ramifications of this vulnerability are not yet proven. However, it is identified as a potential security risk, and updating the Linux Kernel is recommended to mitigate any potential issues.
To fix this vulnerability, update the Linux Kernel to version v5.10.111 or later. This update includes the necessary fix to prevent the incompatible configuration between CONFIG_X86_X32_ABI and llvm-objcopy.
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