FKIE_CVE-2026-98729

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-19 10:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h get_align_mask() returns huge_page_mask_align() for hugetlbfs, but get_align_bits() adds va_align.bits regardless, so vm_unmapped_area() returns an address off the huge page boundary and __unmap_hugepage_range() hits BUG_ON(start & ~huge_page_mask(h)) at teardown. This can be triggered on Carrizo and FX-8370E, both hstates. Pass the file to get_align_bits() and skip the randomisation for hugetlbfs. [ bp: Massage commit message. ]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b46b2e2de47ca9449532b0a7110ed99f79061d6e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d2457a7e2727dc747a61a50d65c2f259afce8c45
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fe23680e6f1d52b8cc45d77bf7c54249508a81c7
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kernel/sys_x86_64.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fe23680e6f1d52b8cc45d77bf7c54249508a81c7",
              "status": "affected",
              "version": "1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0",
              "versionType": "git"
            },
            {
              "lessThan": "b46b2e2de47ca9449532b0a7110ed99f79061d6e",
              "status": "affected",
              "version": "1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0",
              "versionType": "git"
            },
            {
              "lessThan": "d2457a7e2727dc747a61a50d65c2f259afce8c45",
              "status": "affected",
              "version": "1317a5e7f7b1336eac4097f0ef4f5cd7ae72f1d0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kernel/sys_x86_64.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "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\nx86/mm: Don\u0027t apply va_align to hugetlb mappings on AMD F15h\n\nget_align_mask() returns huge_page_mask_align() for hugetlbfs, but get_align_bits()\nadds va_align.bits regardless, so vm_unmapped_area() returns an address off the huge\npage boundary and __unmap_hugepage_range() hits BUG_ON(start \u0026 ~huge_page_mask(h)) at\nteardown.\n\nThis can be triggered on Carrizo and FX-8370E, both hstates.\n\nPass the file to get_align_bits() and skip the randomisation for hugetlbfs.\n\n  [ bp: Massage commit message. ]"
    }
  ],
  "id": "CVE-2026-98729",
  "lastModified": "2026-10-19T10:19:37.053",
  "metrics": {},
  "published": "2026-10-18T16:17:26.530",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b46b2e2de47ca9449532b0a7110ed99f79061d6e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d2457a7e2727dc747a61a50d65c2f259afce8c45"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fe23680e6f1d52b8cc45d77bf7c54249508a81c7"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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