Fixed
Created: Oct 15, 2026
Updated: Oct 20, 2026
Resolved Date: Oct 16, 2026
Found In Version: 10.23.30.2
Fix Version: 10.23.30.8
Severity: Standard
Applicable for: Wind River Linux LTS 23
Component/s: Kernel
In the Linux kernel, the following vulnerability has been resolved: x86/amd_node: Avoid divide by zero on virtualized systems On a virtualized system, the number of nodes does not have a relationship to the number of roots. A Xen PVH dom0 can calculate roots_per_node as 0, which crashes with a divide by zero in: if (count++ % roots_per_node) because the underlying topology code on Xen ends up making num_nodes 2 and num_roots 1 and the integer division result is 0. The issue is seen with Xen, but it could affect other systems. Set roots_per_node to 1 in this case. Print a firmware bug when this is performed for non-virtualized systems. [ bp: Massage commit message. ]
Data source: kernel.org (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
