Use-after-free vulnerability in iommu/arm-smmu-v3-sva
Summary
GSD-2022-1002691: iommu/arm-smmu-v3-sva: Fix mm use-after-free. Affects Kernel versions >= 32784a9562fb0518b12e9797ee2aec52214adf6f, < 9aa215450888cf29af0c479e14a712dc6b0c506c. No fix is published. How to fix ↓
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Background
The iommu/arm-smmu-v3-sva is a component of the Linux Kernel that provides support for the ARM System MMU Version 3 (SMMUv3) Secure Virtual Addressing (SVA) feature. This feature allows for secure and efficient virtual address translation for devices connected to the ARM SMMU. The vulnerability in this component can lead to a use-after-free condition, potentially allowing an attacker to execute arbitrary code or cause a denial-of-service.
Vulnerability Detail
The use-after-free vulnerability in iommu/arm-smmu-v3-sva arises from a programming error that results in incorrect handling of memory management (mm) objects. This can lead to a situation where a memory region is accessed after it has been freed, potentially causing memory corruption or other unexpected behavior. An attacker may be able to exploit this vulnerability to gain unauthorized access, escalate privileges, or disrupt the normal operation of the system. The vulnerability was introduced in Linux Kernel version v5.11 and has been fixed in version v5.18.3.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is recommended to apply the fix mentioned above as soon as possible.
Conclusion
The use-after-free vulnerability in iommu/arm-smmu-v3-sva can have serious security implications, potentially allowing an attacker to execute arbitrary code or cause a denial-of-service. It is crucial to update the Linux Kernel to version v5.18.3 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The use-after-free vulnerability in iommu/arm-smmu-v3-sva can potentially allow an attacker to execute arbitrary code or cause a denial-of-service. This can lead to unauthorized access, privilege escalation, or disruption of system operation.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there is no known public exploit for this vulnerability. However, it is important to apply the fix as soon as possible to mitigate the risk.
Yes, this vulnerability can be exploited remotely if the affected system is accessible over a network. It is recommended to update the Linux Kernel to the fixed version to prevent potential remote exploitation.
To exploit this vulnerability, an attacker would need to have the ability to execute arbitrary code on the target system. This could be achieved through various means, such as gaining unauthorized access or exploiting other vulnerabilities.
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