Memory Leak Vulnerability in vfio/pci Package
Summary
GSD-2022-1001538: vfio/pci: fix memory leak during D3hot to D0 transition. Affects Kernel versions >= 51ef3a004b1eb6241e56b3aa8495769a092a4dc2, < 26ddd196e9eb264da8e1bdc4df8a94d62581c8b5. No fix is published. How to fix ↓
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Background
The vfio/pci package is a component of the Linux Kernel that provides support for the VFIO framework, allowing users to assign and share devices with virtual machines. This package enables direct device access to virtual machines, improving performance and flexibility. However, a vulnerability has been discovered in the package that can lead to a memory leak during the transition from D3hot to D0 state. This vulnerability can potentially be exploited by an attacker to exhaust system memory resources and cause denial-of-service conditions.
Vulnerability Detail
The vulnerability in the vfio/pci package occurs during the transition from the D3hot power state to the D0 power state. During this transition, a memory leak can occur, leading to the gradual depletion of system memory resources. If exploited, an attacker could continuously trigger this transition, causing the system to run out of memory and resulting in a denial-of-service condition. The vulnerability was introduced in version v5.1 of the Linux Kernel and has been fixed in version v5.16.19.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can avoid triggering the D3hot to D0 transition excessively. By minimizing the frequency of this transition, the impact of the memory leak vulnerability can be mitigated. However, this workaround may not provide complete protection, and it is still recommended to apply the official fix by updating the Linux Kernel.
Conclusion
The memory leak vulnerability in the vfio/pci package can lead to denial-of-service conditions by depleting system memory resources. It is crucial to update the Linux Kernel to version v5.16.19 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vfio/pci package is a component of the Linux Kernel that enables direct device access to virtual machines using the VFIO framework.
The vulnerability can lead to a memory leak, gradually depleting system memory resources and potentially causing denial-of-service conditions.
To fix this vulnerability, update the Linux Kernel to version v5.16.19 or later, which includes the necessary patch to address the memory leak issue.
A workaround is to minimize the frequency of the D3hot to D0 transition, but it is still recommended to apply the official fix by updating the Linux Kernel.
The vulnerability was introduced in version v5.1 of the Linux Kernel and fixed in version v5.16.19.
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