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IB/hfi1: Fix the PIO_CRED credit-return mmap

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: IB/hfi1: Fix the PIO_CRED credit-return mmap hfi1_file_mmap()'s PIO_CRED case must hand user space the single credit-return page that holds this context's entry. That page is the second or third page of the per-node credit-return allocation once the hardware send context index reaches 64 or 128, so the failure below is intermittent: when the entry lands on the first page the offset is zero and everything works. Two things are wrong. First, cr_page_offset is a byte offset but .va is a struct credit_return *, so adding it is pointer arithmetic and scales the offset by sizeof(struct credit_return) == 64. memvirt then lands 256 KiB or 512 KiB past a 10240-byte allocation. With an IOMMU translating, that address is inside the vmalloc range but in no vm_area, so dma_mmap_coherent() -> iommu_dma_mmap() finds no pages, vmalloc_to_pfn() returns page_to_pfn(NULL), and remap_pfn_range() installs a frame above MAXPHYADDR. The first user read then takes: psm2_ep_open_pr: Corrupted page table at address 7a14d007e000 PGD 800000013886a067 P4D 800000013886a067 PUD 13886b067 PMD 13886c067 PTE 800049168e911235 Oops: Bad pagetable: 000d [#1] SMP PTI Second, and still wrong once the arithmetic is corrected, dma_mmap_coherent() describes a whole coherent buffer and selects the page within it with vma->vm_pgoff. Offsetting cpu_addr has no effect: for a vmap'd allocation iommu_dma_mmap() uses cpu_addr only to locate the vm_area and

Announced Source revision 1
Original source ↗

CVE-2026-98216

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-2026-98216

Linux

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

Affected versions
Not stated in this record
Fixed versions
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Prerequisites
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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": "1ec82317a1daac78c04b0c15af89018ccf9fa2b7",
        "lessThan": "535530bb2ea5254e1e9f55280143d262dd065204",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1ec82317a1daac78c04b0c15af89018ccf9fa2b7",
        "lessThan": "dcebe0b0bb080a25fe08011fd6b6e741f7912f01",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1ec82317a1daac78c04b0c15af89018ccf9fa2b7",
        "lessThan": "180752deb7270ad37394ab6ef7cf4978fad040b3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1ec82317a1daac78c04b0c15af89018ccf9fa2b7",
        "lessThan": "bafeac9ce5d1ce5256bcf7e5702e831e9aaf419b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1ec82317a1daac78c04b0c15af89018ccf9fa2b7",
        "lessThan": "62f0f34fbd2b2d5653d33d3b9d42fdcabb1c0101",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/infiniband/hw/hfi1/file_ops.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.3"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.3",
        "versionType": "semver"
      },
      {
        "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": [
      "drivers/infiniband/hw/hfi1/file_ops.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98216

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#38295 · Revision 1
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Publisher date
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