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powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba The commit b1af23d836f8 ("KVM: PPC: iommu: Unify TCE checking") unified IOBA parameter checking across KVM and VFIO into iommu_tce_check_ioba(). While doing so, the passed in argument npages is ignored and constant value '1' is used leaving out a possible overflow as the callers can legitimately be using npages > 1 for H_STUFF_TCE or H_PUT_TCE_INDIRECT cases. Fix this by accounting for 'npages', checking for arithmetic overflow, and verifying that the entire requested range (ioba - offset + npages) does not exceed the table capacity 'size'.

Announced Source revision 1
Original source ↗

CVE-2026-98282

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98282

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "b1af23d836f811137d504d14d4cbdd01929dec34",
        "lessThan": "98d8dcc4ebd10523507d4478e148809a7771a213",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b1af23d836f811137d504d14d4cbdd01929dec34",
        "lessThan": "9fd9c9bbb05417f468a11fb6d145d7ff61f4a868",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b1af23d836f811137d504d14d4cbdd01929dec34",
        "lessThan": "3776bf56e06980e8a12c8c0565d9e6ac44965f03",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b1af23d836f811137d504d14d4cbdd01929dec34",
        "lessThan": "d6a1779129d936bc1fbab80181165da544eab736",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b1af23d836f811137d504d14d4cbdd01929dec34",
        "lessThan": "d48ceb6e1a6915c7bac4f902554a1047365cdff2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b1af23d836f811137d504d14d4cbdd01929dec34",
        "lessThan": "0543813753ef5cfbd6fa96694f7acf783fa01af7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b1af23d836f811137d504d14d4cbdd01929dec34",
        "lessThan": "314091243159f8e3749bc719bb129f423f72fd86",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b1af23d836f811137d504d14d4cbdd01929dec34",
        "lessThan": "0b271f7d7f5ed45bc498a03ce0aa9cfd8402fc71",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "arch/powerpc/kernel/iommu.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.12"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.12",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.54",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.8",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "arch/powerpc/kernel/iommu.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98282

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#38360 · Revision 1
Added to Heist Feed
Publisher date
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