Vulnerability in Linux Kernel Affecting Virtualized Systems

CVE-2026-98390

What is CVE-2026-98390?

A vulnerability in the Linux kernel affects virtualized systems, particularly those utilizing Xen hypervisor. The issue arises when a Xen PVH dom0 miscalculates the number of roots per node, resulting in a divide by zero error during integer division operations. This can lead to system crashes, compromising stability and performance. The vulnerability is primarily encountered in configurations where the number of nodes is not proportional to the number of roots, prompting the need for immediate attention to configure roots_per_node correctly to avoid potential disruptions.

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