Buffer Management Vulnerability in Linux Kernel Affecting Networking Operations

CVE-2025-38730

What is CVE-2025-38730?

A vulnerability in the Linux kernel's io_uring networking implementation can lead to issues with buffer management during retry operations. When a provided buffer is registered within a certain execution context, it can become invalid if the context switches before all data is processed. This is particularly concerning when multiple sockets access the same buffer resources, as it may result in data corruption within applications. Specifically, when MSG_WAITALL is set or streaming sockets do not process enough data, buffers may be retained instead of being recycled or committed. To address this, the system must prevent partial retries from allowing these buffers to persist beyond their intended execution context, ensuring that data integrity is maintained.

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