Fix GICR_CTLR.RWP polling in irqchip/gic-v3
Summary
GSD-2022-1002175: irqchip/gic-v3: Fix GICR_CTLR.RWP polling. Affects Kernel versions >= 021f653791ad17e03f98aaa7fb933816ae16f161, < 3c07cc242baf83f0bddbbd9d7945d0bee56d8b57. No fix is published. How to fix ↓
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Background
The Kernel package is a crucial component of the Linux operating system. It provides the core functionality and acts as an interface between the hardware and software layers. The irqchip/gic-v3 module is responsible for managing interrupts on systems with GICv3-compatible interrupt controllers. It allows devices to request and handle interrupts efficiently. However, a vulnerability has been discovered in the GICR_CTLR.RWP polling mechanism, which can potentially lead to security issues.
Vulnerability Detail
The vulnerability in irqchip/gic-v3 arises from a flaw in the GICR_CTLR.RWP polling implementation. This flaw can be exploited by an attacker to manipulate the interrupt controller's control register, potentially leading to unauthorized access or denial of service. The vulnerability was introduced in version v3.17 of the Linux Kernel and has been fixed in version v5.4.189. It is important to note that the impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The GICR_CTLR.RWP polling vulnerability in irqchip/gic-v3 module of the Linux Kernel has been identified and fixed in version v5.4.189. It is recommended to update the Kernel to the latest version to ensure protection against potential exploitation. 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. However, if successfully exploited, it could lead to unauthorized access or denial of service.
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.
No specific workaround has been mentioned for this vulnerability. It is recommended to update the Linux Kernel to the latest version.
There are no known exploits for this vulnerability at the moment. However, it is crucial to apply the recommended update to mitigate any potential risks.
You can find more information about this vulnerability in the GSD-2022-1002175.json file available at https://github.com/cloudsecurityalliance/gsd-database.
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