Linux Kernel Vulnerability in igc Driver

CVE-2026-80715

What is CVE-2026-80715?

A vulnerability in the igc driver of the Linux kernel can lead to indefinite polling by the Network API (NAPI) when an AF_XDP zero-copy application is terminated unexpectedly. This flaw prevents the NAPI state from being cleared, causing the interface to remain active indefinitely. The original implementation used napi_synchronize() before disabling NAPI, which caused it to spin waiting for a state change that would never occur. The resolution involves removing this unnecessary call and allowing napi_disable() to effectively clear the state, ensuring proper functionality of the interface.

References