Memory Leak in uio_hv_generic in Linux Kernel
Summary
GSD-2021-1000495: uio_hv_generic: Fix a memory leak in error handling paths. Affects Kernel versions >= cdfa835c6e5e87d145f9f632b58843de97509f2b, < 53486c467e356e06aa37047c984fccd64d78c827. No fix is published. How to fix ↓
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Background
The uio_hv_generic driver is a part of the Linux Kernel and is responsible for handling communication between the host and guest operating systems in a virtualized environment. It provides a generic interface for handling Hyper-V devices. The driver allows the guest OS to communicate with the host OS and access various hardware resources. However, a memory leak vulnerability has been identified in the error handling paths of the uio_hv_generic driver.
Vulnerability Detail
The memory leak vulnerability in the uio_hv_generic driver can be exploited by an attacker to exhaust system memory resources. When certain error conditions occur during the driver's operation, memory allocated for data structures is not properly freed, leading to a memory leak. This can result in a gradual depletion of available memory, potentially causing system instability or denial of service. The vulnerability was introduced in version v4.20 of the Linux Kernel and has been fixed in version v5.12.7.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability.
Conclusion
The memory leak vulnerability in the uio_hv_generic driver of the Linux Kernel can result in a gradual depletion of system memory, potentially leading to system instability or denial of service. It is crucial to update the Linux Kernel to version v5.12.7 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The memory leak vulnerability in the uio_hv_generic driver can lead to a gradual depletion of system memory, potentially causing system instability or denial of service.
You can use the Vulert playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground, and it will alert you if the vulnerability is present.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the necessary updates to mitigate the risk.
Unfortunately, no specific mitigations have been provided for this vulnerability. It is recommended to update the Linux Kernel as soon as possible to address the issue.
You can find more information about this vulnerability in the GSD-2021-1000495 entry of the GSD database at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000495.json
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