CVE-2026-52968 (GCVE-0-2026-52968)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-06-24 16:28
VLAI
Title
KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic
Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic kvm_s390_pci_aif_enable(), kvm_s390_pci_aif_disable(), and aen_host_forward() index the GAIT by manually multiplying the index with sizeof(struct zpci_gaite). Since aift->gait is already a struct zpci_gaite pointer, this double-scales the offset, accessing element aisb*16 instead of aisb. This causes out-of-bounds accesses when aisb >= 32 (with ZPCI_NR_DEVICES=512) Fix by removing the erroneous sizeof multiplication.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 73f91b004321f2510fa79e66035dbbf1870fcf56 , < 31a9d9f9942885aae356a1a57c79e82c5b5b0828 (git)
Affected: 73f91b004321f2510fa79e66035dbbf1870fcf56 , < a99a25db131ece5e6c0f7632da606de631efe4f2 (git)
Affected: 73f91b004321f2510fa79e66035dbbf1870fcf56 , < 11b8ff5b930b351dd1f6f088dce0beb027ac92d0 (git)
Affected: 73f91b004321f2510fa79e66035dbbf1870fcf56 , < b22a2da8792a7bfe743c1a922e77fa499ddedbe8 (git)
Affected: 73f91b004321f2510fa79e66035dbbf1870fcf56 , < e7216651b94e92e5433fb2f54b77864642b4ea48 (git)
Affected: 73f91b004321f2510fa79e66035dbbf1870fcf56 , < 16d990a15491cf76cd6eef0846e1b4100e63261a (git)
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Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.141 , ≤ 6.6.* (semver)
Unaffected: 6.12.91 , ≤ 6.12.* (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "arch/s390/kvm/interrupt.c",
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      ],
      "cpeApplicability": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic\n\nkvm_s390_pci_aif_enable(), kvm_s390_pci_aif_disable(), and\naen_host_forward() index the GAIT by manually multiplying the index\nwith sizeof(struct zpci_gaite).\n\nSince aift-\u003egait is already a struct zpci_gaite pointer, this\ndouble-scales the offset, accessing element aisb*16 instead of aisb.\n\nThis causes out-of-bounds accesses when aisb \u003e= 32 (with\nZPCI_NR_DEVICES=512)\n\nFix by removing the erroneous sizeof multiplication."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:28:47.438Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/a99a25db131ece5e6c0f7632da606de631efe4f2"
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        },
        {
          "url": "https://git.kernel.org/stable/c/16d990a15491cf76cd6eef0846e1b4100e63261a"
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      ],
      "title": "KVM: s390: pci: fix GAIT table indexing due to double-scaling pointer arithmetic",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-52968",
    "datePublished": "2026-06-24T16:28:47.438Z",
    "dateReserved": "2026-06-09T07:44:35.375Z",
    "dateUpdated": "2026-06-24T16:28:47.438Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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      "date": "2026-07-02",
      "epss": "0.0018",
      "percentile": "0.07779"
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • 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.


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