Fix for event handling soft lockup in iommu/arm-smmu-v3
Summary
GSD-2022-1002009: iommu/arm-smmu-v3: fix event handling soft lockup. Affects Kernel versions < 0b9cf0b599258dfbc8f3b4f21a0ef1faec8c455e. No fix is published. How to fix ↓
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Background
The iommu/arm-smmu-v3 is a component of the Linux Kernel that provides support for Input-Output Memory Management Units (IOMMUs) on ARM-based systems. It is responsible for managing memory access and translation for devices connected to the system. The arm-smmu-v3 module specifically handles event handling related to IOMMU operations. This vulnerability affects the arm-smmu-v3 module in the Linux Kernel.
Vulnerability Detail
The vulnerability in the iommu/arm-smmu-v3 module can lead to a soft lockup in event handling. A soft lockup occurs when a CPU is stuck in a loop or busy-waiting state for an extended period, causing the system to become unresponsive. This vulnerability can be triggered by specific events related to IOMMU operations, potentially leading to a denial-of-service (DoS) condition. 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 iommu/arm-smmu-v3 module in the Linux Kernel is vulnerable to a soft lockup in event handling. This vulnerability can potentially lead to a denial-of-service (DoS) condition. It is recommended to update the Linux Kernel to version v5.10.111 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 a potential denial-of-service (DoS) condition, where the system becomes unresponsive due to a soft lockup in event handling.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it for any open-source vulnerabilities, including this one.
No specific workaround has been mentioned for this vulnerability. The recommended solution is to update the Linux Kernel to version v5.10.111 or later.
There are no known exploits for this vulnerability at the moment. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
You can find more information about this vulnerability in the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and the Cloud Security Alliance's GSD database (https://github.com/cloudsecurityalliance/gsd-database).
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