Vulnerability in Kernel Package: iommu/arm-smmu
Summary
GSD-2021-1001199: iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails. Affects Kernel versions < fe92c058199067ae90cf2a901ddf3c271893557a. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices. The iommu/arm-smmu module within the Kernel package is responsible for managing input-output memory management units (IOMMUs) on ARM-based systems. These IOMMUs handle memory translation and protection for devices connected to the system. However, a vulnerability has been identified in the arm-smmu module that can lead to a reference count leak when the arm_smmu_rpm_get function fails.
Vulnerability Detail
The vulnerability in the iommu/arm-smmu module occurs when the arm_smmu_rpm_get function fails to acquire a reference to the arm_smmu_device structure. This results in a refcount leak, where the reference count for the device is not properly decremented, leading to a potential resource leak. While the impact and attack plausibility of this vulnerability have not been proven, it is essential to address this issue to prevent any potential exploitation or resource exhaustion.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The vulnerability in the iommu/arm-smmu module of the Kernel package can result in a refcount leak when the arm_smmu_rpm_get function fails. To mitigate this issue, it is crucial to update the Kernel package to version v5.13.4 or later. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven, but it could potentially lead to resource leaks and resource exhaustion if exploited.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert analyzes the manifest file (e.g., package-lock.json) of your application and provides real-time alerts for open-source vulnerabilities.
No specific workarounds have been mentioned for this vulnerability. It is recommended to update the Kernel package to the fixed version.
There is no evidence of this vulnerability being exploited in the wild at the moment.
You can refer to the vulnerability details in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/GSD-2021-1001199.json) for more information.
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