{"id":"CVE-2026-98504","title":"PCI: of_property: Omit bus properties without a subordinate bus","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: of_property: Omit bus properties without a subordinate bus\n\nA bridge (a device with a Type 1 header) may not have a secondary bus\nallocated (pdev->subordinate), e.…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 407d1a51921e9f28c1bcec647c2205925bd1fdab < ccd32fa3489cbe86a0b281da4447b4c7eadb3518","Linux >= 407d1a51921e9f28c1bcec647c2205925bd1fdab < a6d97d10e49ae49026ae13af6c41634fce470a37","Linux >= 407d1a51921e9f28c1bcec647c2205925bd1fdab < 879c911f77b8a7862aa16079b04efc3fdc5d32ec","Linux >= 407d1a51921e9f28c1bcec647c2205925bd1fdab < aee774588abd78f75952fd34c3fa461bc46b62c2","Linux >= 407d1a51921e9f28c1bcec647c2205925bd1fdab < 8805840aad73df7146778be243a196d48b4f6430","Linux 6.6"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:17:05.274Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98504","references":[{"url":"https://git.kernel.org/stable/c/ccd32fa3489cbe86a0b281da4447b4c7eadb3518"},{"url":"https://git.kernel.org/stable/c/a6d97d10e49ae49026ae13af6c41634fce470a37"},{"url":"https://git.kernel.org/stable/c/879c911f77b8a7862aa16079b04efc3fdc5d32ec"},{"url":"https://git.kernel.org/stable/c/aee774588abd78f75952fd34c3fa461bc46b62c2"},{"url":"https://git.kernel.org/stable/c/8805840aad73df7146778be243a196d48b4f6430"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.287Z","slug":"CVE-2026-98504","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nPCI: of_property: Omit bus properties without a subordinate bus\n\nA bridge (a device with a Type 1 header) may not have a secondary bus\nallocated (pdev->subordinate), e.g., if there are no available bus numbers\nor the bridge secondary/subordinate bus numbers are not writable.\n\nThe dynamic OF helpers of_pci_prop_bus_range() and of_pci_prop_intr_map()\ndereference pdev->subordinate without checking it.  When\nCONFIG_PCI_DYNAMIC_OF_NODES is enabled, this can cause a NULL pointer\ndereference and early boot hang.\n\nGenerate 'bus-range' and 'interrupt-map' properties only when a subordinate\nbus exists.  Keep the node and its remaining properties for bridges without\none.\n\nThe problem was latent since 407d1a51921e (\"PCI: Create device tree node\nfor bridge\"), but wasn't reachable until 1f340724419e (\"PCI: of: Create\ndevice tree PCI host bridge node\"), which appeared in v6.15.  Before\n1f340724419e, of_pci_make_dev_node() returned early because the parent OF\nnode was missing.\n\n[bhelgaas: move pdev->subordinate test to callees, commit log]\n\n## Affected\n\n- `Linux >= 407d1a51921e9f28c1bcec647c2205925bd1fdab < ccd32fa3489cbe86a0b281da4447b4c7eadb3518`\n- `Linux >= 407d1a51921e9f28c1bcec647c2205925bd1fdab < a6d97d10e49ae49026ae13af6c41634fce470a37`\n- `Linux >= 407d1a51921e9f28c1bcec647c2205925bd1fdab < 879c911f77b8a7862aa16079b04efc3fdc5d32ec`\n- `Linux >= 407d1a51921e9f28c1bcec647c2205925bd1fdab < aee774588abd78f75952fd34c3fa461bc46b62c2`\n- `Linux >= 407d1a51921e9f28c1bcec647c2205925bd1fdab < 8805840aad73df7146778be243a196d48b4f6430`\n- `Linux 6.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}