Buffer Overflow in Linux Kernel Affecting Network Namespace Handling

CVE-2025-21677

Summary

A vulnerability exists in the Linux Kernel's handling of network namespaces, specifically in the PFCP (Packet Forwarding Control Protocol) device management. The issue arises when a PFCP device, linked to a UDP socket across different network namespaces, persists even after the original network is removed. This can lead to unforeseen system behavior and potential stability issues during the cleanup processes of network namespaces. The flaw necessitates enhanced iterations to ensure the correct deallocation of devices and resolves concerns around resource management in a multi-namespace environment. Mitigating this vulnerability is crucial for maintaining the integrity and performance of networking operations within the Linux system.

References