Vulnerability-Lookup

GHSA-GRWC-9M6F-F7HF

Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31

Details

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

iommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX

When using a 5-level translation table via ZPCI_TABLE_TYPE_RFX get_rso_from_iova() returns NULL when the region-first entry is invalid. Yet in get_rto_from_iova() the region-second origin rso is not checked to be non-NULL before accessing rso[rsx] leading to a NULL pointer dereference instead of a NULL return when iova_to_phys() is called on a unmapped IOVA. Fix this by adding the missing NULL check.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-97593"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-25T11:17:10Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX\n\nWhen using a 5-level translation table via ZPCI_TABLE_TYPE_RFX\nget_rso_from_iova() returns NULL when the region-first entry is invalid.\nYet in get_rto_from_iova() the region-second origin rso is not checked\nto be non-NULL before accessing rso[rsx] leading to a NULL pointer\ndereference instead of a NULL return when iova_to_phys() is called on\na unmapped IOVA. Fix this by adding the missing NULL check.",
  "id": "GHSA-grwc-9m6f-f7hf",
  "modified": "2026-09-25T12:31:26Z",
  "published": "2026-09-25T12:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97593"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/20db6573301e66cd65ebf6c130b6563c69374d9d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41b5e0ce6801bf04d8fd3bca46e8c393349ebd5c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0502ed0a1aae97e2ab7a21545903ba612d9f02e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-97593 (GCVE-0-2026-97593)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:22 – Updated: 2026-09-25 10:22

Title

iommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX

Summary

In the Linux kernel, the following vulnerability has been resolved: iommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX When using a 5-level translation table via ZPCI_TABLE_TYPE_RFX get_rso_from_iova() returns NULL when the region-first entry is invalid. Yet in get_rto_from_iova() the region-second origin rso is not checked to be non-NULL before accessing rso[rsx] leading to a NULL pointer dereference instead of a NULL return when iova_to_phys() is called on a unmapped IOVA. Fix this by adding the missing NULL check.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 54/100 over 6633 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/d0502ed0a1aae97e2…
https://git.kernel.org/stable/c/41b5e0ce6801bf04d…
https://git.kernel.org/stable/c/20db6573301e66cd6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 81244074b518aeb90de5f68e7e825564c29c5c50 , < d0502ed0a1aae97e2ab7a21545903ba612d9f02e (git) Affected: 81244074b518aeb90de5f68e7e825564c29c5c50 , < 41b5e0ce6801bf04d8fd3bca46e8c393349ebd5c (git) Affected: 81244074b518aeb90de5f68e7e825564c29c5c50 , < 20db6573301e66cd65ebf6c130b6563c69374d9d (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.2.7 , ≤ 7.2.* (semver) Unaffected: 7.3-rc3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/s390-iommu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d0502ed0a1aae97e2ab7a21545903ba612d9f02e",
              "status": "affected",
              "version": "81244074b518aeb90de5f68e7e825564c29c5c50",
              "versionType": "git"
            },
            {
              "lessThan": "41b5e0ce6801bf04d8fd3bca46e8c393349ebd5c",
              "status": "affected",
              "version": "81244074b518aeb90de5f68e7e825564c29c5c50",
              "versionType": "git"
            },
            {
              "lessThan": "20db6573301e66cd65ebf6c130b6563c69374d9d",
              "status": "affected",
              "version": "81244074b518aeb90de5f68e7e825564c29c5c50",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/s390-iommu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.7",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc3",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX\n\nWhen using a 5-level translation table via ZPCI_TABLE_TYPE_RFX\nget_rso_from_iova() returns NULL when the region-first entry is invalid.\nYet in get_rto_from_iova() the region-second origin rso is not checked\nto be non-NULL before accessing rso[rsx] leading to a NULL pointer\ndereference instead of a NULL return when iova_to_phys() is called on\na unmapped IOVA. Fix this by adding the missing NULL check."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T10:22:09.913Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d0502ed0a1aae97e2ab7a21545903ba612d9f02e"
        },
        {
          "url": "https://git.kernel.org/stable/c/41b5e0ce6801bf04d8fd3bca46e8c393349ebd5c"
        },
        {
          "url": "https://git.kernel.org/stable/c/20db6573301e66cd65ebf6c130b6563c69374d9d"
        }
      ],
      "title": "iommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97593",
    "datePublished": "2026-09-25T10:22:09.913Z",
    "dateReserved": "2026-09-24T16:01:01.157Z",
    "dateUpdated": "2026-09-25T10:22:09.913Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

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.
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GHSA-GRWC-9M6F-F7HF

CVE-2026-97593 (GCVE-0-2026-97593)

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