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CVE-2025-40076 (GCVE-0-2025-40076)

Vulnerability from cvelistv5 – Published: 2025-10-28 11:48 – Updated: 2026-05-11 21:42
VLAI
Title
PCI: rcar-host: Pass proper IRQ domain to generic_handle_domain_irq()
Summary
In the Linux kernel, the following vulnerability has been resolved: PCI: rcar-host: Pass proper IRQ domain to generic_handle_domain_irq() Starting with commit dd26c1a23fd5 ("PCI: rcar-host: Switch to msi_create_parent_irq_domain()"), the MSI parent IRQ domain is NULL because the object of type struct irq_domain_info passed to: msi_create_parent_irq_domain() -> irq_domain_instantiate()() -> __irq_domain_instantiate() has no reference to the parent IRQ domain. Using msi->domain->parent as an argument for generic_handle_domain_irq() leads to below error: "Unable to handle kernel NULL pointer dereference at virtual address" This error was identified while switching the upcoming RZ/G3S PCIe host controller driver to msi_create_parent_irq_domain() (which was using a similar pattern to handle MSIs (see link section)), but it was not tested on hardware using the pcie-rcar-host controller driver due to lack of hardware. [mani: reworded subject and description]
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: dd26c1a23fd5a607c50738ea0dcb6cdbb8185cfe , < e8e21aaf5d34015901cd271053a67a62b4204526 (git)
Affected: dd26c1a23fd5a607c50738ea0dcb6cdbb8185cfe , < d3fee10e40a938331e2aae34348691136db31304 (git)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.17.3 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/pci/controller/pcie-rcar-host.c"
          ],
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          "vendor": "Linux",
          "versions": [
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            }
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      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: rcar-host: Pass proper IRQ domain to generic_handle_domain_irq()\n\nStarting with commit dd26c1a23fd5 (\"PCI: rcar-host: Switch to\nmsi_create_parent_irq_domain()\"), the MSI parent IRQ domain is NULL because\nthe object of type struct irq_domain_info passed to:\n\nmsi_create_parent_irq_domain() -\u003e\n  irq_domain_instantiate()() -\u003e\n    __irq_domain_instantiate()\n\nhas no reference to the parent IRQ domain. Using msi-\u003edomain-\u003eparent as an\nargument for generic_handle_domain_irq() leads to below error:\n\n\t\"Unable to handle kernel NULL pointer dereference at virtual address\"\n\nThis error was identified while switching the upcoming RZ/G3S PCIe host\ncontroller driver to msi_create_parent_irq_domain() (which was using a\nsimilar pattern to handle MSIs (see link section)), but it was not tested\non hardware using the pcie-rcar-host controller driver due to lack of\nhardware.\n\n[mani: reworded subject and description]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:42:01.057Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e8e21aaf5d34015901cd271053a67a62b4204526"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3fee10e40a938331e2aae34348691136db31304"
        }
      ],
      "title": "PCI: rcar-host: Pass proper IRQ domain to generic_handle_domain_irq()",
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        "engine": "bippy-1.2.0"
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40076",
    "datePublished": "2025-10-28T11:48:42.385Z",
    "dateReserved": "2025-04-16T07:20:57.160Z",
    "dateUpdated": "2026-05-11T21:42:01.057Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-09-16",
      "epss": "0.00172",
      "percentile": "0.06892"
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:16:04+00:00",
      "cve": "CVE-2025-40076",
      "id": "CVE-2025-40076",
      "initial_release_date": "2025-10-28T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: PCI: rcar-host: Pass proper IRQ domain to generic_handle_domain_irq()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40076.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-28T16:55:50Z",
      "cve": "CVE-2025-40076",
      "id": "CVE-2025-40076",
      "initial_release_date": "2025-10-29T00:24:41Z",
      "product_status:known_not_affected": "514",
      "product_status:recommended": "6",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-40076",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-40076.json",
      "version": "11"
    }
  }
}



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