Vulnerability in Kernel: iommu/arm-smmu
Summary
UVI-2021-1001274: iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails. Affects Kernel versions < c4007596fbdabc29f858dc2e1990858a146b60b2. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system that provides core functionalities and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the security and stability of the system. The iommu/arm-smmu module within the Kernel is responsible for handling input-output memory management unit (IOMMU) operations on ARM-based systems. It provides memory mapping and translation services for devices connected to the system, enhancing security and performance.
However, a vulnerability has been identified in the iommu/arm-smmu module that could potentially lead to security breaches and system instability.
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 of the device is not properly managed, leading to resource leaks and potential memory corruption.
If exploited, this vulnerability could allow an attacker to manipulate memory mappings and gain unauthorized access to sensitive information or execute arbitrary code. The impact of this vulnerability depends on the specific context in which the affected system is deployed, but it has the potential to compromise system integrity and confidentiality.
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 poses a significant risk to system security and stability. It is crucial to promptly update the Linux Kernel to version v5.10.52 or later to mitigate this vulnerability. By applying the official fix, the refcount leak in the arm_smmu_device structure is resolved, ensuring proper resource management and safeguarding the system against potential attacks. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The iommu/arm-smmu module is a component of the Linux Kernel that handles input-output memory management unit (IOMMU) operations on ARM-based systems. It provides memory mapping and translation services for devices connected to the system, enhancing security and performance.
If exploited, this vulnerability could allow an attacker to manipulate memory mappings and gain unauthorized access to sensitive information or execute arbitrary code. The impact of this vulnerability depends on the specific context in which the affected system is deployed, but it has the potential to compromise system integrity and confidentiality.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.10.52 or later. The fix for this issue was implemented in commit c4007596fbdabc29f858dc2e1990858a146b60b2 of the Linux Kernel repository. By updating to the latest version, the refcount leak in the arm_smmu_device structure is addressed, ensuring proper resource management and mitigating the vulnerability.
No specific workaround has been provided for this vulnerability. It is recommended to apply the official fix by updating the Linux Kernel to the recommended version.
For more information about this vulnerability, you can refer to the source link provided in the database_specific section of the vulnerability details.
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