Vulnerability in powerpc/iommu package: Missing of_node_put in iommu_init_early_dart
Summary
GSD-2022-1002698: powerpc/iommu: Add missing of_node_put in iommu_init_early_dart. Affects Kernel versions < 7e3f1dfb9e21733d7276bc9ccea4daada163f2ba. No fix is published. How to fix ↓
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Background
The powerpc/iommu package is a component of the Linux Kernel, which is responsible for managing input/output memory management units (IOMMUs) on PowerPC architecture systems. IOMMUs are hardware devices that provide memory address translation and protection for input/output devices. The iommu_init_early_dart function is a part of this package and is used for initializing the IOMMU subsystem during the early boot process.
Vulnerability Detail
The vulnerability in the powerpc/iommu package arises from a missing of_node_put function call in the iommu_init_early_dart function. This omission can lead to a memory leak issue, as the reference count of the device tree node is not properly decremented. An attacker may potentially exploit this vulnerability to exhaust system memory resources, resulting in a denial-of-service 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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Workaround
There is no mentioned workaround for this vulnerability.
Conclusion
The powerpc/iommu package in the Linux Kernel is vulnerable to a memory leak issue due to a missing of_node_put function call in the iommu_init_early_dart function. This vulnerability can potentially lead to a denial-of-service condition. It is recommended to update to Linux Kernel version v5.18.3 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The powerpc/iommu package is a component of the Linux Kernel that manages input/output memory management units (IOMMUs) on PowerPC architecture systems.
The iommu_init_early_dart function is responsible for initializing the IOMMU subsystem during the early boot process.
The vulnerability can potentially lead to a memory leak issue, which may result in a denial-of-service condition by exhausting system memory resources.
No, the impact and attack plausibility of this vulnerability have not been proven yet.
To fix this vulnerability, update to Linux Kernel version v5.18.3 or later, which includes the necessary fix commit 7e3f1dfb9e21733d7276bc9ccea4daada163f2ba.
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