Fix for event handling soft lockup in iommu/arm-smmu-v3
Summary
GSD-2022-1002198: iommu/arm-smmu-v3: fix event handling soft lockup. Affects Kernel versions < ea057ac8c9427bc01271ccbb86fed69a793d3d64. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The iommu/arm-smmu-v3 is a component in the Linux Kernel that provides support for Input-Output Memory Management Units (IOMMUs) on ARM-based systems. It is responsible for managing memory mappings between devices and the CPU. The arm-smmu-v3 module specifically handles event handling for the IOMMU. This vulnerability affects the arm-smmu-v3 module and can lead to a soft lockup, causing the system to become unresponsive.
Vulnerability Detail
The vulnerability in the iommu/arm-smmu-v3 module can result in a soft lockup, where the system becomes unresponsive and fails to handle events properly. This can be exploited by an attacker to cause a denial-of-service (DoS) condition, potentially leading to a system crash or disruption of service. The vulnerability has been fixed in Linux Kernel version v5.4.189 by commit ea057ac8c9427bc01271ccbb86fed69a793d3d64.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Conclusion
The iommu/arm-smmu-v3 module in the Linux Kernel is vulnerable to a soft lockup issue, which can lead to system unresponsiveness and potential service disruptions. It is crucial to update the Linux Kernel to version v5.4.189 or later to fix this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The vulnerability can lead to a soft lockup, causing the system to become unresponsive and potentially leading to a system crash or disruption of service.
You can check the version of the Linux Kernel installed on your system. If it is earlier than v5.4.189, your system may be vulnerable. Additionally, you can use tools like Vulert Playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability.
No specific workaround has been provided for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
There are no known exploits for this vulnerability at the moment. However, it is important to apply the fix as soon as possible to mitigate the risk.
You can refer to the commit ea057ac8c9427bc01271ccbb86fed69a793d3d64 in the Linux Kernel repository for more details about the fix.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
