Vulnerability in vsock/virtio Package: Freeing Queued Packets When Closing Socket
Summary
UVI-2021-1000240: vsock/virtio: free queued packets when closing socket. Affects Kernel versions >= ac03046ece2b158ebd204dfc4896fd9f39f0e6c8, < 37c38674ef2f8d7e8629e5d433c37d6c1273d16b. No fix is published. How to fix ↓
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Background
The vsock/virtio package is a component of the Linux Kernel, which is responsible for providing support for virtual sockets and the virtio transport protocol. This package enables communication between virtual machines and the host system. It allows efficient data transfer and facilitates inter-VM communication. However, a vulnerability has been identified in this package that can lead to potential security risks.
Vulnerability Detail
The identified vulnerability in the vsock/virtio package involves the failure to free queued packets when closing a socket. This issue was introduced in version v5.2 of the Linux Kernel and was fixed in version v5.12.4. When a socket is closed, the queued packets associated with it are not properly freed, leading to potential memory leaks and resource exhaustion. Although the impact and attack plausibility of this vulnerability have not been proven, it is essential to address this issue to ensure the security and stability of the system.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As this vulnerability has been fixed in the latest version of the Linux Kernel, there is no specific workaround available. It is advisable to update the Kernel to the recommended version to resolve the issue.
Conclusion
The vulnerability in the vsock/virtio package, which involves the failure to free queued packets when closing a socket, has been identified and fixed in the Linux Kernel version v5.12.4. It is crucial to update the Kernel to this version or later to mitigate the risk of memory leaks and resource exhaustion. For further support and assistance in vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The vsock/virtio package is a component of the Linux Kernel that provides support for virtual sockets and the virtio transport protocol. It enables efficient data transfer and facilitates communication between virtual machines and the host system.
The impact of this vulnerability is not yet proven. However, if left unaddressed, it could potentially lead to memory leaks and resource exhaustion, which may impact the stability and security of the system.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.12.4 or later. This update includes the necessary patch to address the issue and ensure that queued packets are correctly freed when closing a socket.
As this vulnerability has been fixed in the latest version of the Linux Kernel, there is no specific workaround available. It is advisable to update the Kernel to the recommended version to resolve the issue.
For more information about this vulnerability, you can refer to the provided references link, which includes details about the specific commits in the Linux Kernel repository.
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