{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0a4b61d9c2e496b5f0a10e29e355a1465c8738bb"
            },
            {
              "fixed": "9273a90465d58b82aca4bea71451ef6bee084928"
            },
            {
              "fixed": "94e984d8858a3228952b02f84e66610961098cc2"
            },
            {
              "fixed": "72bd92bd8190d7869ecb462649ca40f297822a33"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.17.8"
            },
            {
              "fixed": "6.18"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "c4ad899a33198ab6335732c769835d035e66894a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.18.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98390.json"
  },
  "details": "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. ]",
  "id": "CVE-2026-98390",
  "modified": "2026-10-16T02:30:32.057094404Z",
  "published": "2026-10-14T13:25:54.905Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72bd92bd8190d7869ecb462649ca40f297822a33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9273a90465d58b82aca4bea71451ef6bee084928"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94e984d8858a3228952b02f84e66610961098cc2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98390.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98390"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "x86/amd_node: Avoid divide by zero on virtualized systems"
}