Memory Leak Vulnerability in iommu/vt-d

Kernel Updated 02 Oct 2025

Summary

27/02/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000584: iommu/vt-d: Fix potential memory leak in intel_setup_irq_remapping(). Affects Kernel versions >= e3beca48a45b5e0e6e6a4e0124276b8248dcc9bb, < 336d096b62bdc673e852b6b80d5072d7888ce85d. No fix is published. How to fix ↓

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Background

The iommu/vt-d package is a component of the Linux Kernel that provides support for Input-Output Memory Management Units (IOMMUs) and Virtualization Technology for Directed I/O (VT-d). IOMMUs are responsible for mapping and translating memory addresses between devices and the CPU, while VT-d enables secure device assignment and isolation in virtualized environments. This vulnerability affects the iommu/vt-d package and can lead to potential memory leaks.

Vulnerability Detail

The vulnerability in the iommu/vt-d package is related to a potential memory leak in the intel_setup_irq_remapping() function. This function is responsible for setting up interrupt remapping for Intel IOMMU devices. A memory leak occurs when memory is allocated but not properly deallocated, leading to a gradual depletion of available memory resources. If exploited, this vulnerability could result in system instability, performance degradation, or even denial of service.

How To Fix

No fixed version is published for this vulnerability.

To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.15.22 or later. This fix is implemented in commit 336d096b62bdc673e852b6b80d5072d7888ce85d. Updating the kernel will ensure that the memory leak issue in the intel_setup_irq_remapping() function is resolved.

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Workaround

There is no specific workaround mentioned for this vulnerability. The recommended approach is to update the Linux Kernel to the fixed version.

Conclusion

The memory leak vulnerability in the iommu/vt-d package can be fixed by updating the Linux Kernel to version v5.15.22 or later. It is crucial to apply this update to prevent potential system instability, performance issues, or denial of service. For further support on vulnerability remediation, you can contact DevNack.com.

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