Vulnerability in Kernel: irqchip/gic-v3-its
Summary
UVI-2021-1001542: irqchip/gic-v3-its: Fix potential VPE leak on error. Affects Kernel versions >= 7d75bbb4bc1ad90386776459d37e4ddfe605671e, < 7d39992d45acd6f2d6b2f62389c55b61fb3d486b. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. The irqchip/gic-v3-its module is specifically related to interrupt handling in systems using the Generic Interrupt Controller (GIC) version 3. The GIC is responsible for managing interrupts and distributing them to the appropriate processors. This vulnerability in irqchip/gic-v3-its module could potentially lead to a Virtual Processor Element (VPE) leak when an error occurs.
Vulnerability Detail
The vulnerability in irqchip/gic-v3-its module allows for a potential VPE leak when an error condition is encountered. A VPE leak refers to the unintended allocation of Virtual Processor Elements, which can lead to resource exhaustion and potential denial-of-service attacks. The exact impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in Linux Kernel version v4.14.249 by commit 7d39992d45acd6f2d6b2f62389c55b61fb3d486b. The vulnerability was introduced in version v4.14 by commit 7d75bbb4bc1ad90386776459d37e4ddfe605671e.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The vulnerability in irqchip/gic-v3-its module can potentially lead to a Virtual Processor Element (VPE) leak, causing resource exhaustion and denial-of-service attacks. It is crucial to update the Linux Kernel to version v4.14.249 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven. However, if exploited, it could potentially lead to resource exhaustion and denial-of-service attacks.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities, using just a manifest file like package-lock.json.
No specific workaround has been mentioned for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
No known exploits for this vulnerability have been reported at this time.
You can find more information about this vulnerability in the official Linux Kernel repository and the Cloud Security Alliance's GSD database.
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