Vulnerability in Kernel package: powerpc/64s
Summary
UVI-2021-1000444: powerpc/64s: Fix crashes when toggling entry flush barrier. Affects Kernel versions >= f69bb4e51f41973fb7594be1479fa689831efe1a, < 2db22ba4e0e103f00e0512e0ecce36ac78c644f8. No fix is published. How to fix ↓
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Background
The Kernel package is a fundamental component of the Linux operating system. It provides the core functionality and interfaces for various hardware devices and software components. The powerpc/64s module within the Kernel package specifically handles operations related to the PowerPC architecture on 64-bit systems. This vulnerability affects the powerpc/64s module and can lead to crashes when toggling the entry flush barrier.
Vulnerability Detail
The vulnerability in the powerpc/64s module arises from a flaw introduced in version v4.19.159 of the Linux Kernel. When attempting to toggle the entry flush barrier, the system may crash due to an incorrect implementation. Although the impact and attack plausibility have not been proven, this vulnerability has the potential to disrupt system stability and availability. It is crucial to address this issue to ensure the reliable operation of PowerPC-based systems.
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 Kernel package to the fixed version.
Conclusion
The vulnerability in the powerpc/64s module of the Kernel package can lead to system crashes when toggling the entry flush barrier. It is crucial to update the Kernel package to version v4.19.191 or later to address this vulnerability and ensure the stability and availability of PowerPC-based systems. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can result in system crashes when toggling the entry flush barrier in the powerpc/64s module. This can lead to system instability and potential disruption of services.
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 provide real-time alerts for open-source vulnerabilities, including this one.
No, only versions starting from v4.19.159 up to v4.19.190 are affected by this vulnerability. The fix was implemented in version v4.19.191 and later.
At the time of this report, there is no known exploit for this vulnerability. However, it is essential to address the issue promptly to prevent potential exploitation in the future.
As there is no specific workaround mentioned, it is recommended to prioritize updating the Kernel package to the fixed version. This will ensure a comprehensive resolution to the vulnerability.
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