Remote Code Execution in Linux Kernel Affects Network Performance

CVE-2026-74708

What is CVE-2026-74708?

A vulnerability has been identified in the Linux kernel that allows for improper validation of launch-time metadata size in the xsk module. This defect arises when the metadata exceeds the size of the struct xsk_tx_metadata, possibly leading to erroneous requests that process incomplete fields. Additionally, this issue can result in inconsistent network operations due to the handling of validated flags in the generic transmit path. While the xsk_skb_metadata properly utilizes these flags, the current implementation in __xsk_buff_get_metadata does not, leaving room for potential errors. Future updates aim to address these inconsistencies, ensuring more robust network performance.

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