CVE-2026-98506 (GCVE-0-2026-98506)
Vulnerability from cvelistv5
Published
2026-10-18 15:17
Modified
2026-10-19 09:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: do not dissolve gigantic pages without runtime support dissolve_free_hugetlb_folio() doesn't check hstate_is_gigantic_no_runtime(h) though remove_hugetlb_folio()/ update_and_free_hugetlb_folio() silently bail for such folios, so it frees a still-listed folio and, on vmemmap restore failure, the add_hugetlb_folio() rollback corrupts the free list.
References
Impacted products
Vendor Product Version
Linux Linux Version: 6eb4e88a6d27022ea8aff424d47a0a5dfc9fcb34
Version: 6eb4e88a6d27022ea8aff424d47a0a5dfc9fcb34
Version: 6eb4e88a6d27022ea8aff424d47a0a5dfc9fcb34
Version: 6eb4e88a6d27022ea8aff424d47a0a5dfc9fcb34
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/hugetlb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ddc1055b557506a6ea8930dfbd8d1555d6a3f01e",
              "status": "affected",
              "version": "6eb4e88a6d27022ea8aff424d47a0a5dfc9fcb34",
              "versionType": "git"
            },
            {
              "lessThan": "ccf96a4b8626a001c13c5836d8357f31c57bbd8e",
              "status": "affected",
              "version": "6eb4e88a6d27022ea8aff424d47a0a5dfc9fcb34",
              "versionType": "git"
            },
            {
              "lessThan": "443628f755b35bf45044f68b970b65cd531c42fd",
              "status": "affected",
              "version": "6eb4e88a6d27022ea8aff424d47a0a5dfc9fcb34",
              "versionType": "git"
            },
            {
              "lessThan": "a363c62a653cc8b3e21da9545fa4e028ef50f9c3",
              "status": "affected",
              "version": "6eb4e88a6d27022ea8aff424d47a0a5dfc9fcb34",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/hugetlb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.112",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.55",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.9",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/hugetlb: do not dissolve gigantic pages without runtime support\n\ndissolve_free_hugetlb_folio() doesn\u0027t check\nhstate_is_gigantic_no_runtime(h) though remove_hugetlb_folio()/\nupdate_and_free_hugetlb_folio() silently bail for such folios, so it frees\na still-listed folio and, on vmemmap restore failure, the\nadd_hugetlb_folio() rollback corrupts the free list."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:20:45.266Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ddc1055b557506a6ea8930dfbd8d1555d6a3f01e"
        },
        {
          "url": "https://git.kernel.org/stable/c/ccf96a4b8626a001c13c5836d8357f31c57bbd8e"
        },
        {
          "url": "https://git.kernel.org/stable/c/443628f755b35bf45044f68b970b65cd531c42fd"
        },
        {
          "url": "https://git.kernel.org/stable/c/a363c62a653cc8b3e21da9545fa4e028ef50f9c3"
        }
      ],
      "title": "mm/hugetlb: do not dissolve gigantic pages without runtime support",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98506",
    "datePublished": "2026-10-18T15:17:12.898Z",
    "dateReserved": "2026-09-25T10:25:14.353Z",
    "dateUpdated": "2026-10-19T09:20:45.266Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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