UNKNOWN NVD
CVE-2026-98390
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 num
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. ]
References
- https://git.kernel.org/stable/c/72bd92bd8190d7869ecb462649ca40f297822a33
- https://git.kernel.org/stable/c/9273a90465d58b82aca4bea71451ef6bee084928
- https://git.kernel.org/stable/c/94e984d8858a3228952b02f84e66610961098cc2
This unknown severity vulnerability was published on 2026-10-14 via NVD.
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