mm/hugetlb: fix early boot crash on parameters without '=' separator

{
  "id": "3b42d8a3d289b4edc53fae19982cd60b15a8a405cf7fec1fb0aa548bcd31fdb1",
  "url": "https://osv.dev/vulnerability/CVE-2026-46284",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mm/hugetlb: fix early boot crash on parameters without '=' separator",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix early boot crash on parameters without '=' separator If hugepages, hugepagesz, or default_hugepagesz are specified on the kernel command line without the '=' separator, early parameter parsing passes NULL to hugetlb_add_param(), which dereferences it in strlen() and can crash the system during early boot. Reject NULL values in hugetlb_add_param() and return -EINVAL instead.",
    "evidence": "osv:CVE-2026-46284",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.27",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-46284",
      "aliases": [
        "CVE-2026-46284"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5b47c02967ab770aa7661c8863a21b2fd59e35ff"
                },
                {
                  "fixed": "2774bcf714739cc6bb86f8812167bb9fbda70f6a"
                },
                {
                  "fixed": "357c6d084b6137ae640209c5bfd01180f985c015"
                },
                {
                  "fixed": "c45b354911d01565156e38d7f6bc07edb51fc34c"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46284.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.15.0"
                },
                {
                  "fixed": "6.18.27"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.0.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46284.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.706193031Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2774bcf714739cc6bb86f8812167bb9fbda70f6a",
        "https://git.kernel.org/stable/c/357c6d084b6137ae640209c5bfd01180f985c015",
        "https://git.kernel.org/stable/c/c45b354911d01565156e38d7f6bc07edb51fc34c",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46284.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-46284",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46284.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-46284",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 517764,
  "published_at": "2026-06-08T15:41:27.467+00:00"
}