Vulnerability-Lookup

GHSA-56F2-RW4Q-8X32

Vulnerability from github – Published: 2026-10-18 18:31 – Updated: 2026-10-18 18:31

Details

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.

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]

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-98504"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-18T16:17:01Z",
    "severity": null
  },
  "details": "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-\u003esubordinate), 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-\u003esubordinate without checking it.  When\nCONFIG_PCI_DYNAMIC_OF_NODES is enabled, this can cause a NULL pointer\ndereference and early boot hang.\n\nGenerate \u0027bus-range\u0027 and \u0027interrupt-map\u0027 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\u0027t 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-\u003esubordinate test to callees, commit log]",
  "id": "GHSA-56f2-rw4q-8x32",
  "modified": "2026-10-18T18:31:52Z",
  "published": "2026-10-18T18:31:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98504"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/879c911f77b8a7862aa16079b04efc3fdc5d32ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8805840aad73df7146778be243a196d48b4f6430"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6d97d10e49ae49026ae13af6c41634fce470a37"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aee774588abd78f75952fd34c3fa461bc46b62c2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ccd32fa3489cbe86a0b281da4447b4c7eadb3518"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98504 (GCVE-0-2026-98504)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:17 – Updated: 2026-10-19 09:20

Title

PCI: of_property: Omit bus properties without a subordinate bus

Summary

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. 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]

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7018 records in the last 180 days details

References

5 references

URL	Tags
https://git.kernel.org/stable/c/ccd32fa3489cbe86a…
https://git.kernel.org/stable/c/a6d97d10e49ae4902…
https://git.kernel.org/stable/c/879c911f77b8a7862…
https://git.kernel.org/stable/c/aee774588abd78f75…
https://git.kernel.org/stable/c/8805840aad73df714…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 407d1a51921e9f28c1bcec647c2205925bd1fdab , < ccd32fa3489cbe86a0b281da4447b4c7eadb3518 (git) Affected: 407d1a51921e9f28c1bcec647c2205925bd1fdab , < a6d97d10e49ae49026ae13af6c41634fce470a37 (git) Affected: 407d1a51921e9f28c1bcec647c2205925bd1fdab , < 879c911f77b8a7862aa16079b04efc3fdc5d32ec (git) Affected: 407d1a51921e9f28c1bcec647c2205925bd1fdab , < aee774588abd78f75952fd34c3fa461bc46b62c2 (git) Affected: 407d1a51921e9f28c1bcec647c2205925bd1fdab , < 8805840aad73df7146778be243a196d48b4f6430 (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.158 , ≤ 6.6.* (semver) Unaffected: 6.12.112 , ≤ 6.12.* (semver) Unaffected: 6.18.55 , ≤ 6.18.* (semver) Unaffected: 7.2.9 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/of_property.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ccd32fa3489cbe86a0b281da4447b4c7eadb3518",
              "status": "affected",
              "version": "407d1a51921e9f28c1bcec647c2205925bd1fdab",
              "versionType": "git"
            },
            {
              "lessThan": "a6d97d10e49ae49026ae13af6c41634fce470a37",
              "status": "affected",
              "version": "407d1a51921e9f28c1bcec647c2205925bd1fdab",
              "versionType": "git"
            },
            {
              "lessThan": "879c911f77b8a7862aa16079b04efc3fdc5d32ec",
              "status": "affected",
              "version": "407d1a51921e9f28c1bcec647c2205925bd1fdab",
              "versionType": "git"
            },
            {
              "lessThan": "aee774588abd78f75952fd34c3fa461bc46b62c2",
              "status": "affected",
              "version": "407d1a51921e9f28c1bcec647c2205925bd1fdab",
              "versionType": "git"
            },
            {
              "lessThan": "8805840aad73df7146778be243a196d48b4f6430",
              "status": "affected",
              "version": "407d1a51921e9f28c1bcec647c2205925bd1fdab",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/of_property.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.112",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.55",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.9",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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-\u003esubordinate), 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-\u003esubordinate without checking it.  When\nCONFIG_PCI_DYNAMIC_OF_NODES is enabled, this can cause a NULL pointer\ndereference and early boot hang.\n\nGenerate \u0027bus-range\u0027 and \u0027interrupt-map\u0027 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\u0027t 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-\u003esubordinate test to callees, commit log]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:20:43.250Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
        }
      ],
      "title": "PCI: of_property: Omit bus properties without a subordinate bus",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98504",
    "datePublished": "2026-10-18T15:17:05.274Z",
    "dateReserved": "2026-09-25T10:25:14.353Z",
    "dateUpdated": "2026-10-19T09:20:43.250Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted