NULL Pointer Dereference in Hyper-V Virtual Machines Affecting Linux Kernel ixgbevf Driver

CVE-2026-43094

What is CVE-2026-43094?

A vulnerability has been identified in the ixgbevf driver of the Linux kernel affecting Hyper-V virtual machines. A missing callback for negotiating features led to a situation where dereferencing a NULL function pointer occurs, resulting in a critical NULL pointer dereference during the probe process. This issue may cause the affected virtual machine to crash, potentially leading to service disruption. The problem arises from the ixgbevf_hv_mac_ops not including the necessary negotiate_features callback, which was overlooked in prior commits. A resolution has been implemented to gracefully handle this scenario, ensuring better stability and security for Hyper-V deployments.

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