Buffer Management Issue in Linux Kernel's xsk Component

CVE-2026-74560

What is CVE-2026-74560?

A buffer management vulnerability in the Linux kernel's xsk component can lead to improper handling of the TX ring descriptors, potentially causing userspace to lose track of buffers. The issue arises in scenarios where partially built multi-buffer sockets are discarded, and the completion queue fails to register the addresses of these buffers. The fix involves updating the xsk_drop_skb() function to ensure that buffer addresses are appropriately published and not permanently lost. Proper address management is crucial for maintaining system performance and reliability in handling network traffic.

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