Linearization Issue in Linux Kernel's IP-TFS Handling

CVE-2026-31517

What is CVE-2026-31517?

A vulnerability exists in the Linux kernel's IP-TFS handling where the system may experience a panic due to improper handling of non-linear socket buffers during packet reassembly. When a zero-copy method fails, the attempt to append data can lead to invoking skb_put on a non-linear socket buffer, causing an SKB_LINEAR_ASSERT failure. This can result in system instability, necessitating a check for non-linearity and appropriate linearization to ensure smooth reassembly of packets.

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