Fix for powerpc/64s program check interrupt emergency stack path vulnerability in Kernel
Summary
GSD-2021-1001619: powerpc/64s: fix program check interrupt emergency stack path. Affects Kernel versions >= 0a882e28468f48ab3d9a36dde0a5723ea29ed1ed, < 411b38fe68ba20a8bbe724b0939762c3f16e16ca. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that provides core functionalities and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and ensures the stability and security of the system. The powerpc/64s module is specific to the PowerPC architecture and is responsible for handling program check interrupts. These interrupts occur when an illegal or invalid instruction is encountered during program execution.
Vulnerability Detail
The powerpc/64s module in the Kernel has a vulnerability that could be exploited by attackers. When a program check interrupt occurs, the module uses an emergency stack to handle the interrupt. However, there is a flaw in the path taken to access this emergency stack, which could lead to a program crash or potential code execution by an attacker. The impact and attack plausibility of this vulnerability have not been proven yet, but it is essential to address it to ensure the security and stability of the system.
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. It is advised to apply the fix by updating the Kernel to the recommended version.
Conclusion
The powerpc/64s program check interrupt emergency stack path vulnerability in the Kernel could potentially lead to a program crash or code execution by an attacker. It is crucial to update the Kernel to version v5.10.73 or later to fix this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it could potentially lead to a program crash or code execution by an attacker.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it in real-time.
There is no known exploit for this vulnerability at the moment. However, it is crucial to apply the fix to prevent any potential exploitation.
It is not recommended to manually patch the vulnerability without updating the Kernel. Updating the Kernel to the recommended version ensures that all necessary fixes and improvements are applied.
You can find more information about this vulnerability in the GSD-2021-1001619 entry of the GSD database maintained by the Cloud Security Alliance. The link to the specific entry is available in the references section.
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