mtd: intel-dg: Fix accessing regions before setting nregions

{
  "id": "472dd004347d41af6179a0d25cc8c0bf96918296f64417fa0ff11890579a7a92",
  "url": "https://osv.dev/vulnerability/CVE-2026-45896",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mtd: intel-dg: Fix accessing regions before setting nregions",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: mtd: intel-dg: Fix accessing regions before setting nregions The regions array is counted by nregions, but it's set only after accessing it: [] UBSAN: array-index-out-of-bounds in drivers/mtd/devices/mtd_intel_dg.c:750:15 [] index 0 is out of range for type ' [*]' Fix it by also fixing an undesired behavior: the loop silently ignores ENOMEM and continues setting the other entries.",
    "evidence": "osv:CVE-2026-45896",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.14",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-45896",
      "aliases": [
        "CVE-2026-45896"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ceb5ab3cb64637952657be23d347e1c79dd02212"
                },
                {
                  "fixed": "721bd22bcf45a63ebd9bd0f478ef721b45cc5383"
                },
                {
                  "fixed": "d58fca8513414b15387460b14a7a0a30405b9c9e"
                },
                {
                  "fixed": "779c59274d03cc5c07237a2c845dfb71cff77705"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45896.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.17.0"
                },
                {
                  "fixed": "6.18.14"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45896.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.077127765Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/721bd22bcf45a63ebd9bd0f478ef721b45cc5383",
        "https://git.kernel.org/stable/c/779c59274d03cc5c07237a2c845dfb71cff77705",
        "https://git.kernel.org/stable/c/d58fca8513414b15387460b14a7a0a30405b9c9e",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45896.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-45896",
        "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/2026/45xxx/CVE-2026-45896.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-45896",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 486972,
  "published_at": "2026-05-27T12:17:06.332+00:00"
}