powerpc/64s: Fix crashes when toggling entry flush barrier
Summary
GSD-2021-1000479: powerpc/64s: Fix crashes when toggling entry flush barrier. Affects Kernel versions >= fa4bf9f38184ed7ca4916eb64f8c767d1e279c1f, < 0c25a7bb697f2e6ee65b6d63782f675bf129511a. No fix is published. How to fix ↓
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Background
The vulnerability affects the Kernel package in the Linux ecosystem. The Kernel is the core component of the Linux operating system, responsible for managing system resources and providing an interface for applications to interact with the hardware. The powerpc/64s module is specific to the powerpc architecture and is used for 64-bit powerpc systems. The vulnerability in this module can lead to crashes when toggling the entry flush barrier.
Vulnerability Detail
The vulnerability arises from a flaw in the powerpc/64s module that causes crashes when toggling the entry flush barrier. The entry flush barrier is a mechanism used to ensure consistency when flushing cache entries. The specific technical details of the vulnerability have not been provided, but it is important to note that the impact and attack plausibility have not been proven. The vulnerability was introduced in version v4.9.245 of the Linux Kernel and has been fixed in version v4.9.269.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No workaround has been provided for this vulnerability.
Conclusion
The powerpc/64s module in the Linux Kernel is vulnerable to crashes when toggling the entry flush barrier. It is recommended to update the Kernel to version v4.9.269 or later to fix this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The impact of this vulnerability is not specified in the provided information. However, it is known to cause crashes when toggling the entry flush barrier in the powerpc/64s module.
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 to the playground and it will alert you in real-time if the vulnerability is present.
The provided information does not mention any known exploits for this vulnerability. However, it is always recommended to apply security patches promptly to mitigate the risk of exploitation.
The vulnerability affects powerpc/64s module in the Linux Kernel. Therefore, it is only applicable to systems running the powerpc architecture and using the affected version of the Kernel (v4.9.245 to v4.9.268).
For more information about this vulnerability, you can refer to the source link provided in the database_specific section of the vulnerability details (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000479.json).
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