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CVE-2026-98504

Status: ReceivedUnscored—
Severity—Unscored
Exploitation probability0.20 %higher than 9% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

In the Linux kernel, the following vulnerability has been resolved:

PCI: of_property: Omit bus properties without a subordinate bus

A bridge (a device with a Type 1 header) may not have a secondary bus allocated (pdev->subordinate), e.g., if there are no available bus numbers or the bridge secondary/subordinate bus numbers are not writable.

The dynamic OF helpers of_pci_prop_bus_range() and of_pci_prop_intr_map() dereference pdev->subordinate without checking it. When CONFIG_PCI_DYNAMIC_OF_NODES is enabled, this can cause a NULL pointer dereference and early boot hang.

Generate 'bus-range' and 'interrupt-map' properties only when a subordinate bus exists. Keep the node and its remaining properties for bridges without one.

Read full descriptionShow less

The problem was latent since 407d1a51921e ("PCI: Create device tree node for bridge"), but wasn't reachable until 1f340724419e ("PCI: of: Create device tree PCI host bridge node"), which appeared in v6.15. Before 1f340724419e, of_pci_make_dev_node() returned early because the parent OF node was missing.

[bhelgaas: move pdev->subordinate test to callees, commit log]

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.20 %
Percentile among all scored CVEs
9
Score date
10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux KernelAI

References

Show 5 references

Raw JSON (NVD)

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{
  "id": "CVE-2026-98504",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "407d1a51921e9f28c1bcec647c2205925bd1fdab",
              "lessThan": "ccd32fa3489cbe86a0b281da4447b4c7eadb3518",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "407d1a51921e9f28c1bcec647c2205925bd1fdab",
              "lessThan": "a6d97d10e49ae49026ae13af6c41634fce470a37",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "407d1a51921e9f28c1bcec647c2205925bd1fdab",
              "lessThan": "879c911f77b8a7862aa16079b04efc3fdc5d32ec",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "407d1a51921e9f28c1bcec647c2205925bd1fdab",
              "lessThan": "aee774588abd78f75952fd34c3fa461bc46b62c2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "407d1a51921e9f28c1bcec647c2205925bd1fdab",
              "lessThan": "8805840aad73df7146778be243a196d48b4f6430",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/pci/of_property.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.6",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/pci/of_property.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-18T16:17:01.493",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/879c911f77b8a7862aa16079b04efc3fdc5d32ec",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8805840aad73df7146778be243a196d48b4f6430",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a6d97d10e49ae49026ae13af6c41634fce470a37",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/aee774588abd78f75952fd34c3fa461bc46b62c2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ccd32fa3489cbe86a0b281da4447b4c7eadb3518",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "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.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]"
    }
  ],
  "lastModified": "2026-10-19T10:19:03.637",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}