FKIE_CVE-2026-52968

Vulnerability from fkie_nvd - Published: 2026-06-24 17:17 - Updated: 2026-06-24 17:17
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/11b8ff5b930b351dd1f6f088dce0beb027ac92d0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/16d990a15491cf76cd6eef0846e1b4100e63261a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/31a9d9f9942885aae356a1a57c79e82c5b5b0828
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a99a25db131ece5e6c0f7632da606de631efe4f2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b22a2da8792a7bfe743c1a922e77fa499ddedbe8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e7216651b94e92e5433fb2f54b77864642b4ea48
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/s390/kvm/interrupt.c",
            "arch/s390/kvm/pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "31a9d9f9942885aae356a1a57c79e82c5b5b0828",
              "status": "affected",
              "version": "73f91b004321f2510fa79e66035dbbf1870fcf56",
              "versionType": "git"
            },
            {
              "lessThan": "a99a25db131ece5e6c0f7632da606de631efe4f2",
              "status": "affected",
              "version": "73f91b004321f2510fa79e66035dbbf1870fcf56",
              "versionType": "git"
            },
            {
              "lessThan": "11b8ff5b930b351dd1f6f088dce0beb027ac92d0",
              "status": "affected",
              "version": "73f91b004321f2510fa79e66035dbbf1870fcf56",
              "versionType": "git"
            },
            {
              "lessThan": "b22a2da8792a7bfe743c1a922e77fa499ddedbe8",
              "status": "affected",
              "version": "73f91b004321f2510fa79e66035dbbf1870fcf56",
              "versionType": "git"
            },
            {
              "lessThan": "e7216651b94e92e5433fb2f54b77864642b4ea48",
              "status": "affected",
              "version": "73f91b004321f2510fa79e66035dbbf1870fcf56",
              "versionType": "git"
            },
            {
              "lessThan": "16d990a15491cf76cd6eef0846e1b4100e63261a",
              "status": "affected",
              "version": "73f91b004321f2510fa79e66035dbbf1870fcf56",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/s390/kvm/interrupt.c",
            "arch/s390/kvm/pci.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "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."
    }
  ],
  "id": "CVE-2026-52968",
  "lastModified": "2026-06-24T17:17:07.243",
  "metrics": {},
  "published": "2026-06-24T17:17:07.243",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/11b8ff5b930b351dd1f6f088dce0beb027ac92d0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/16d990a15491cf76cd6eef0846e1b4100e63261a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/31a9d9f9942885aae356a1a57c79e82c5b5b0828"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a99a25db131ece5e6c0f7632da606de631efe4f2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b22a2da8792a7bfe743c1a922e77fa499ddedbe8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e7216651b94e92e5433fb2f54b77864642b4ea48"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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