{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "6eb4e88a6d27022ea8aff424d47a0a5dfc9fcb34"
            },
            {
              "fixed": "ddc1055b557506a6ea8930dfbd8d1555d6a3f01e"
            },
            {
              "fixed": "ccf96a4b8626a001c13c5836d8357f31c57bbd8e"
            },
            {
              "fixed": "443628f755b35bf45044f68b970b65cd531c42fd"
            },
            {
              "fixed": "a363c62a653cc8b3e21da9545fa4e028ef50f9c3"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.13.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98506.json"
  },
  "details": "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't 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.",
  "id": "CVE-2026-98506",
  "modified": "2026-10-20T02:30:48.507794335Z",
  "published": "2026-10-18T15:17:12.898Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/443628f755b35bf45044f68b970b65cd531c42fd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a363c62a653cc8b3e21da9545fa4e028ef50f9c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ccf96a4b8626a001c13c5836d8357f31c57bbd8e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ddc1055b557506a6ea8930dfbd8d1555d6a3f01e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98506.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98506"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "mm/hugetlb: do not dissolve gigantic pages without runtime support"
}