Linux Kernel Vulnerability in Open vSwitch Affecting Network Operations

CVE-2025-21761

What is CVE-2025-21761?

A vulnerability exists in the Open vSwitch component of the Linux kernel, specifically within the function 'ovs_vport_cmd_fill_info()'. This function can be invoked without the necessary RCU (Read-Copy-Update) protection, which may lead to undefined behavior and potential use-after-free conditions. To mitigate this risk, updates now incorporate RCU protection alongside 'dev_net_rcu()', ensuring that network operations can be executed safely and effectively without compromising system stability.

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