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

Vulnerability from cvelistv5 – Published: 2026-09-25 10:22 – Updated: 2026-09-25 10:22
VLAI
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
References
Impacted products
Vendor Product Version
Linux Linux Affected: 81244074b518aeb90de5f68e7e825564c29c5c50 , < d0502ed0a1aae97e2ab7a21545903ba612d9f02e (git)
Affected: 81244074b518aeb90de5f68e7e825564c29c5c50 , < 41b5e0ce6801bf04d8fd3bca46e8c393349ebd5c (git)
Affected: 81244074b518aeb90de5f68e7e825564c29c5c50 , < 20db6573301e66cd65ebf6c130b6563c69374d9d (git)
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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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{
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              "operator": "OR"
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          "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."
        }
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      "providerMetadata": {
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        {
          "url": "https://git.kernel.org/stable/c/20db6573301e66cd65ebf6c130b6563c69374d9d"
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      ],
      "title": "iommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX",
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    "dateReserved": "2026-09-24T16:01:01.157Z",
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            "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."
          }
        ],
        "id": "CVE-2026-97593",
        "lastModified": "2026-09-25T11:17:10.547",
        "metrics": {},
        "published": "2026-09-25T11:17:10.547",
        "references": [
          {
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      "cve": "CVE-2026-97593",
      "id": "CVE-2026-97593",
      "initial_release_date": "2026-09-25T00:00:00+00:00",
      "product_status:known_affected": "183",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: iommu/s390: Fix NULL dereference in iova_to_phys() with ZPCI_TABLE_TYPE_RFX",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97593.json",
      "version": "3"
    }
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}



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