{"schema":"threatline.record/2","record":{"id":"CVE-2026-98390","aliases":[],"summary":"x86/amd_node: Avoid divide by zero on virtualized systems","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. ]","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98390","source_modified_at":"2026-10-19T09:18:41.175Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"0a4b61d9c2e496b5f0a10e29e355a1465c8738bb","lessThan":"9273a90465d58b82aca4bea71451ef6bee084928","status":"affected","versionType":"git"},{"version":"0a4b61d9c2e496b5f0a10e29e355a1465c8738bb","lessThan":"94e984d8858a3228952b02f84e66610961098cc2","status":"affected","versionType":"git"},{"version":"0a4b61d9c2e496b5f0a10e29e355a1465c8738bb","lessThan":"72bd92bd8190d7869ecb462649ca40f297822a33","status":"affected","versionType":"git"},{"version":"c4ad899a33198ab6335732c769835d035e66894a","status":"affected","versionType":"git"},{"version":"6.17.8","lessThan":"6.18","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98390","source_modified_at":"2026-10-19T09:18:41.175Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.18","status":"affected"},{"version":"0","lessThan":"6.18","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98390","source_modified_at":"2026-10-19T09:18:41.175Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9273a90465d58b82aca4bea71451ef6bee084928","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98390","source_modified_at":"2026-10-19T09:18:41.175Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"94e984d8858a3228952b02f84e66610961098cc2","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98390","source_modified_at":"2026-10-19T09:18:41.175Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"72bd92bd8190d7869ecb462649ca40f297822a33","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98390","source_modified_at":"2026-10-19T09:18:41.175Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6.18","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00206,"percentile":0.10157,"score_date":"2026-10-23"},"published_at":"2026-10-14T13:25:54.905Z","modified_at":"2026-10-19T09:18:41.175Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98390","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:18:41.175Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98390","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/9273a90465d58b82aca4bea71451ef6bee084928"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/94e984d8858a3228952b02f84e66610961098cc2"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/72bd92bd8190d7869ecb462649ca40f297822a33"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:18:41.175Z","content_hash":"70a2f308cfb60fbae23e07726a6103d874385e4b88d82e199f172a19c0d325e9"}}