Vulnerability in iommu/arm-smmu Package: Fix arm_smmu_device Refcount Leak in Address Translation

Kernel Updated 02 Oct 2025

Summary

03/08/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001337: iommu/arm-smmu: Fix arm_smmu_device refcount leak in address translation. Affects Kernel versions < b11220803ad14a2a880cc06d8e01fe2548cc85b0. No fix is published. How to fix ↓

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Background

The iommu/arm-smmu package is a component of the Linux Kernel that provides support for the ARM System MMU (SMMU) architecture. The SMMU is responsible for managing address translations between devices and memory in ARM-based systems. It ensures secure and efficient data transfers by mapping virtual addresses to physical addresses. However, a vulnerability has been identified in the arm_smmu_device module of the iommu/arm-smmu package, which can lead to a refcount leak during address translation.

Vulnerability Detail

The vulnerability in the arm_smmu_device module of the iommu/arm-smmu package results in a refcount leak during address translation. This leak can potentially lead to resource exhaustion and other memory-related issues. An attacker may be able to exploit this vulnerability to cause a denial-of-service condition or execute arbitrary code with elevated privileges. The vulnerability has been assigned the ID GSD-2021-1001337 and has been fixed in Linux Kernel version v5.4.134 by commit b11220803ad14a2a880cc06d8e01fe2548cc85b0.

How To Fix

No fixed version is published for this vulnerability.

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Conclusion

In conclusion, the iommu/arm-smmu package contains a vulnerability in the arm_smmu_device module that can result in a refcount leak during address translation. This vulnerability has been assigned the ID GSD-2021-1001337 and has been fixed in Linux Kernel version v5.4.134. It is crucial to update the iommu/arm-smmu package to the latest version to mitigate the risk of exploitation. For further support on vulnerability remediation, you can reach out to DevNack.com.

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