{"id":"CVE-2026-98390","published":"2026-10-14T14:17:49.873","lastModified":"2026-10-14T14:17:49.873","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/amd_node: Avoid divide by zero on virtualized systems\n\nOn a virtualized system, the number of nodes does not have a relationship to\nthe number of roots.  A Xen PVH dom0 can calculate roots_per_node as 0, which\ncrashes with a divide by zero in:\n\n  if (count++ % roots_per_node)\n\nbecause the underlying topology code on Xen ends up making num_nodes\n2 and num_roots 1 and the integer division result is 0.\n\nThe issue is seen with Xen, but it could affect other systems.\n\nSet roots_per_node to 1 in this case. Print a firmware bug when this is\nperformed for non-virtualized systems.\n\n  [ bp: Massage commit message. ]","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/72bd92bd8190d7869ecb462649ca40f297822a33","tags":[]},{"url":"https://git.kernel.org/stable/c/9273a90465d58b82aca4bea71451ef6bee084928","tags":[]},{"url":"https://git.kernel.org/stable/c/94e984d8858a3228952b02f84e66610961098cc2","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}